Page 1
Service
Maintenance
Manual
DECpc LPx/LPx+
PC
K-MN-SD00000 19-JG00.A
MCS LOGISTICS
ENGINEERING
-
NIJMEGEN
THE NETHERLANDS
Copyright Digital Equipment Corporation
All rights reserved
January 1996
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January 1996
The information in this document is subject to change without notice and should not be construed as a
commitment by Digital Equipment Corporation.
Digital Equipment Corporation assumes no responsibility for any errors that might appear in this document.
The software, if any, described in this document is furnished under a license and may be used or copied
only in accordance with the terms of such license. No responsibility is assumed for the use or reliability of
software or equipment that is not supplied by Digital Equipment Corporation or its affiliated companies.
Restricted Rights: Use, duplication, or disclosure by the U.S. Government is subject to restrictions as set
forth in subparagraph (c) (1) (ii) of the Rights in Technical Data and Computer Software clause at DFARS
252.227-7013.
Copyright Digital Equipment Corporation
All Rights Reserved
The following are trademarks of Digital Equipment Corporation:
DECpc and the Digital logo.
The following are third party trademarks:
MS-DOS and Windows and Windows NT and Windows NT Server are trademarks of Microsoft Corp.
Novell and Netware are trademarks of Novell, Inc.
SCO and Open Desktop are trademarks of The Santa Cruz Operation, Inc.
UNIX is a registered trademark of UNIX System Laboratories, Inc.
All other trademarks and registered trademarks are the property of their respective holders.
Created by:
MCS Logistics Engineering - Nijmegen
Printed in Ireland
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Digital DECpc LPx/LPx+ Table of Contents
Table of Contents
REVISION HISTORY........................................................................................................................................7
PREFACE..............................................................................................................................................................9
CHAPTER 1 PRODUCT DESCRIPTION ..................................................................................................11
PRODUCT INTRODUCTION ...................................................................................................................................11
PRODUCT MODELS INFORMATION .....................................................................................................................13
DECpc LPx Models Information...................................................................................................................13
DECpc LPx+ Models Information.................................................................................................................14
CHAPTER 2 SYSTEM UTILITIES & CONFIGURATION....................................................................15
SYSTEM UTILITIES ...............................................................................................................................................15
Using the System Utilities Diskette ...............................................................................................................16
Running SETUP.EXE.....................................................................................................................................16
EPP3SMC.EXE...............................................................................................................................................16
KP.EXE............................................................................................................................................................17
Copying KP.EXE onto Hard Disk .................................................................................................................17
Setting a Keyboard and Mouse Password.....................................................................................................17
Configuring the Computer..............................................................................................................................18
Running the BIOS Setup Utility ....................................................................................................................18
UPGRADE.EXE (DECpc LPx 560/566) ......................................................................................................18
Before Using UPGRADE.EXE (DECpc LPx 560/566)...............................................................................19
Creating a Recovery Diskette (DECpc LPx 560/566)..................................................................................19
Upgrading the Computer's BIOS (DECpc LPx 560/566) ............................................................................20
Helpful Hints...................................................................................................................................................21
BIOS SETUP UTILITY OPTIONS ..........................................................................................................................22
CHAPTER 3 SERVICE PROCEDURES.....................................................................................................31
SAFETY REQUIREMENTS .....................................................................................................................................31
RECOMMENDED TOOLS .....................................................................................Error! Bookmark not defined.
Other Materials Needed..................................................................................................................................32
Special Tools Required...................................................................................................................................32
Remedial Diagnostic Test Software...............................................................................................................32
Recommended Virus Detection and Cleanup Software...............................................................................32
ECO/FCO INFORMATION ....................................................................................................................................33
BIOS Version Information.............................................................................................................................33
UNLOCKING AND REMOVING COVER.................................................................................................................34
COMPUTER COMPONENTS ...................................................................................................................................35
EXPANSION SLOTS ...............................................................................................................................................36
Expansion slots for LPx Models....................................................................................................................36
LPx Expansion Slots.......................................................................................................................................36
Expansion slots for LPx+ Models..................................................................................................................37
LPx+ Expansion Slots ....................................................................................................................................37
Expansion slots for LPx 560/566 Models.....................................................................................................38
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Table of Contents Digital DECpc LPx/LPx+
Px 560/566 Expansion Slots ..........................................................................................................................38
Installing Expansion Boards ..........................................................................................................................39
MAIN LOGIC BOARD JUMPERS ...........................................................................................................................40
LPx Main Logic Board Jumper Settings.......................................................................................................41
LPx Main Logic Board Jumper Locations....................................................................................................42
LPx+ Main Logic Board Jumper Settings.....................................................................................................43
LPx+ Main Logic Board Jumper Locations..................................................................................................44
LPx 560/566 Main Logic Board Jumper Settings........................................................................................45
LPx 560/566 Main Logic Board Jumper Locations.....................................................................................46
LPx 560/566 CPU Board Jumper Settings....................................................................................................47
LPx 560/566 CPU Board Jumper Locations.................................................................................................47
COMPUTER MEMORY CONFIGURATIONS ..........................................................................................................48
LPx and LPx+ Memory Configurations........................................................................................................48
LPx and LPx+ SIMM Socket Locations.......................................................................................................49
LPx 560/566 Memory Configurations ..........................................................................................................50
LPx 560/566 SIMM Socket Locations..........................................................................................................51
REMOVAL PROCEDURES .....................................................................................................................................52
Removing the 3½-Inch Diskette Drive..........................................................................................................52
Removing a 5¼-Inch Device .........................................................................................................................53
Removing a 3½-Inch Mass Storage Device (Internal Drive Bay)...............................................................54
Removing the Fan Pipe ..................................................................................................................................55
Removing the Fan /Speaker Assembly .........................................................................................................56
Removing the Main Logic Board ..................................................................................................................57
LPx Main Logic Board Connections.............................................................................................................57
LPx+ Main Logic Board Connections...........................................................................................................58
LPx 560/566 Main Logic Board Connections..............................................................................................59
Removing the CPU Module (LPx 560/566) .................................................................................................60
Removing the LPx(+) Power Supply ............................................................................................................61
Removing the Filler Panel..............................................................................................................................62
INSTALLATION PROCEDURES .............................................................................................................................63
Installing External Cache Memory................................................................................................................63
Installing a Higher Performance CPU (LPx/LPX+).....................................................................................65
Installing a Higher Performance CPU (LPx 560/566) .................................................................................66
REPLACEMENT PROCEDURES .............................................................................................................................67
Replacing the Computer Battery/Real Time Clock (RTC) (LPx)................................................................67
Replacing the Computer Battery (LPx+).......................................................................................................68
Replacing the Computer Battery/Real Time Clock (RTC) (LPx 560/566).................................................69
CONNECTING DISKETTE AND IDE DEVICES ......................................................................................................70
Diskette/IDE Connections..............................................................................................................................71
CONNECTING SCSI DEVICES ..............................................................................................................................72
SCSI Connections...........................................................................................................................................72
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Digital DECpc LPx/LPx+ Table of Contents
CHAPTER 4 TROUBLESHOOTING..........................................................................................................73
INITIAL TROUBLESHOOTING ...............................................................................................................................73
BEEP CODES .........................................................................................................................................................74
Beep Codes for Fatal Errors...........................................................................................................................74
Beep Codes for Non-Fatal Errors...................................................................................................................75
POST AND BOOT MESSAGES ..............................................................................................................................75
COMPUTER TROUBLESHOOTING .........................................................................................................................77
DISK DRIVE TROUBLESHOOTING .......................................................................................................................79
MONITOR TROUBLESHOOTING ...........................................................................................................................80
QAPlus/FE Error Messages............................................................................................................................81
CHAPTER 5 DEVICE MAPPING................................................................................................................83
Memory Map (LPx/LPx+) .............................................................................................................................83
Memory Map (LPx 560/566 Full Range)......................................................................................................84
Memory Map (LPx 560/566 PC Compatibility Range)...............................................................................84
I/O Address Map (LPx/LPx+)........................................................................................................................85
CPU I/O Address Map (LPx 560/566)..........................................................................................................85
I/O Address Map (LPx 560/566) ...................................................................................................................86
PCI Configure Space Address Map (LPx 560/566).....................................................................................86
Computer Interrupt Levels (LPx/LPx+)........................................................................................................86
Computer Interrupt Levels (LPx 560/566)....................................................................................................87
DMA Channel Assignment (all models).......................................................................................................87
CHAPTER 6 PASS / FAIL CRITERIA........................................................................................................89
APPENDIX A SERVICE NOTES.................................................................................................................91
APPENDIX B USEFUL INFORMATION...................................................................................................93
RELATED DOCUMENTATION ...............................................................................................................................93
ON-LINE BULLETIN BOARDS ..............................................................................................................................94
DOCUMENT FEEDBACK ..............................................................................................................................95
PERSONAL NOTES .........................................................................................................................................97
READERS COMMENTS........................................................................................................................................101
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Table of Contents Digital DECpc LPx/LPx+
Table of Figures
Figure 3 - 1 Removing the Outside Cover.........................................................................................................34
Figure 3 - 2 LPX Computer Model Components..............................................................................................35
Figure 3 - 3 LPx Expansion Slots ......................................................................................................................36
Figure 3 - 4 LPx+ Expansion Slots....................................................................................................................37
Figure 3 - 5 LPx 560/566 Expansion Slots .......................................................................................................38
Figure 3 - 6 Installing Expansion Slots..............................................................................................................39
Figure 3 - 7 LPx Main Logic Board Jumper Locations....................................................................................42
Figure 3 - 8 LPx+ Main Logic Board Jumper Locations .................................................................................44
Figure 3 - 9 LPx 560/566 Main Logic Board Jumper Locations.....................................................................46
Figure 3 - 10 LPx 560/566 CPU Board Jumper Locations..............................................................................47
Figure 3 - 11 LPx and LPx+ SIMM Socket Locations.....................................................................................49
Figure 3 - 12 LPx 560/566 SIMM Socket Locations.......................................................................................51
Figure 3 - 13 Removing the 3½-Inch Diskette..................................................................................................52
Figure 3 - 14 Removing a 5¼-Inch Device.......................................................................................................53
Figure 3 - 15 Removing a 3½-Inch Mass Storage Device from the Internal Drive Bay................................54
Figure 3 - 16 Removing the Fan Pipe................................................................................................................55
Figure 3 - 17 Removing the Fan /Speaker Assembly.......................................................................................56
Figure 3 - 18 LPx Main Logic Board Connections ..........................................................................................57
Figure 3 - 19 LPx+ Main Logic Board Connections........................................................................................58
Figure 3 - 20 LPx 560/566 Main Logic Board Connections............................................................................59
Figure 3 - 21 Removing a CPU Module (LPx 560/566)..................................................................................60
Figure 3 - 22 Removing the LPx(+) Power Supply..........................................................................................61
Figure 3 - 23 Removing the LPx(+) Filler Panel..............................................................................................62
Figure 3 - 24 Installing External Cache Memory .............................................................................................64
Figure 3 - 25 Installing a Higher Performance CPU (LPx/LPx+)...................................................................65
Figure 3 - 26 Installing a Higher Performance CPU (LPx 560/566)...............................................................66
Figure 3 - 27 Replacing the Computer Battery /Real Time Clock (LPx)........................................................67
Figure 3 - 28 Replacing the Computer Battery (LPx+)....................................................................................68
Figure 3 - 29 Replacing the Computer Battery /Real Time Clock (LPx 560/566).........................................69
Figure 3 - 30 Diskette/IDE Connections ...........................................................................................................71
Figure 3 - 31 SCSI Connections ........................................................................................................................72
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Digital DECpc LPx/LPx+ Revision History
Revision
Date
Description of Change
Revision History
A01
Januari 96 First release of the Service Maintenance Manual describing the
DECpc LPx/LPx+ series computer. This manual also includes the
DECpc LPx 560/566.
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Digital DECpc LPx/LPx+ Preface
Preface
The DECpc LPx/LPx+ Service Maintenance Manual is a troubleshooting guide that can be used for
reference when servicing the DECpc LPx/LPx+ line of PC’s.
Digital Equipment Corporation reserves the right to make changes to the DECpc LPx/LPx+ series without
notice. Accordingly, the diagrams and procedures in this document may not apply to the computer(s) to be
serviced since many of the diagnostic tests are designed to test more than one product.
CAUTION
Digital recommends that only A+ certified engineers attempt to repair this equipment.
All troubleshooting and repair procedures are detailed to support subassembly/module
level exchange. Because of the complexity of the indivual boards and subassemblies, no
one should attempt to make repairs at component level or to make modifications to any
printed wiring board. Improper repairs can create a safety hazard. Any indications of
component replacement or printed wiring board modifications may void warranty or
exchange allowances.
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Digital DECpc LPx/LPx+ Product Description
Chapter 1 Product Description
Product Introduction
DECpc LPx and LPx+ computers are high-performance personal computers equipped with the latest
microprocessor and VL-bus technology. They can be used as stand-alone computers, as clients, or as
servers in an network environment. Developed using modular CPU technology and offering a host of
high-performance options, the DECpc LPx/LPx+ offers the most advanced computer in its class.
DECpc LPx 560/566 computers are high-performance personal computers equipped with the latest
microprocessor and PCI local bus technology.
All DECpc LPx and LPx+ computers are industry-standard Intel i486 or Pentium microprocessor-based
PCs using a versatile full profile ISA-style enclosure. The computer features a modular CPU design that
allows easy upgrades to the latest available CPU technology.
DECpc LPx features:
♦ 4 MB system RAM, expandable up to 64 MB on motherboard
♦ Optional external cache memory expandable to 128 KB and 256 KB
♦ ZIF (Zero Insertion Force) socket for easy upgrade to 486 or Pentium
♦ Embedded IDE controller
♦ Overdrive upgrade P24T or overdrive CPU - the socket can also be inserted with SL enhanced 486 or
486 at 25 MHz or 30 MHz
♦ Modular design with a choice of two VESA-LB cards (S3805 or S3864)
♦ Supports up to five storage devices
♦ Six full-size, 16-bit ISA expansion slots, or five full-size, 16-bit ISA expansion slots and one VL local
bus slot, or four full-size, 16-bit ISA expansion slots and two VESA local bus slots
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Product Description Digital DECpc LPx/LPx+
DECpc LPx+ features:
♦ Energy Star compliant
♦ 4 MB system RAM, expandable up to 64 MB on motherboard
♦ Optional external cache memory expandable to 128 KB and 256 KB
♦ ZIF (Zero Insertion Force) socket for easy upgrade to 486 or Pentium
♦ Enhanced IDE allows hard disks bigger than 1024 cylinders
♦ Overdrive upgrade P24T or overdrive CPU - the socket can also be inserted with SL enhanced 486 or
486 at 25 MHz or 30 MHz
♦ Modular design with a choice of two VESA-LB cards (S3805 or S3864)
♦ Supports up to five storage devices
♦ Six full-size, 16-bit ISA expansion slots, or five full-size, 16-bit ISA expansion slots and one VL local
bus slot, or four full-size, 16-bit ISA expansion slots and two VESA local bus slots
DECpc LPx 560/566 features:
♦ Pentium CPU operating at 60 or 66 MHz
♦ 8 MB system RAM, expandable up to 128 MB on motherboard
♦ Standard 256 KB of secondary cache memory
♦ ZIF socket for CPU upgrades
♦ Supports up to five storage devices
♦ 4 ISA slots and 2 PCI 32-bit local bus slots or 3 ISA and 3 PCI 32-bit local bus slots
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Digital DECpc LPx/LPx+ Product Description
Product
Model
Memory
Cache
Options
Product Models Information
EC = English, French, German, Italian and Spanish.
ED = Danish, Dutch, English, Finnish, French (France excluded), Norwegian and Swedish.
DECpc LPx Models Information
FDD HDD
DECpc LPx 425sx
PC761-A9 - - - None
PC761-WA 1.44MB 170MB 4MB None
PC761-WB 1.44MB 240MB 8MB None
DECpc LPx 433sx
DECpc LPx 433dx
DECpc LPx 450d2
DECpc LPx 466d2
DECpc LPx 560
DECpc LPx 566
PC762-A9 - - - None
PC762-WA 1.44MB 170MB 4MB None
PC762-WB 1.44MB 240MB 8MB None
PC763-A9 - - - None
PC763-WA 1.44MB 170MB 4MB None
PC763-WB 1.44MB 240MB 8MB None
PC763-WC 1.44MB 525MB 8MB None
PC764-A9 - - - None
PC764-WA 1.44MB 170MB 4MB None
PC764-WB 1.44MB 240MB 8MB None
PC764-WC 1.44MB 525MB 8MB None
PC766-A9 - - - None
PC766-WA 1.44MB 170MB 4MB None
PC766-WB 1.44MB 240MB 8MB None
PC766-WC 1.44MB 525MB 8MB None
FR-810WW-xx - - -
FR-811WW-xx - - -
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Product Description Digital DECpc LPx/LPx+
Product
Model
Memory
Cache
Options
DECpc LPx+ Models Information
FDD HDD
DECpc LPx+ 433sx
FR-802WW-A9 - - - None
FR-802**-WA 1.44MB 170MB 4MB None
FR-802**-WF 1.44MB 340MB 8MB None
FR-802**-WC 1.44MB 540MB 8MB None
DECpc LPx+ 433dx
DECpc LPx+ 450d2
DECpc LPx+ 466d2
DECpc LPx+ 4100d2
DECpc LPx+ 450s2
FR-803WW-A9 - - - None
FR-803**-WA 1.44MB 170MB 4MB None
FR-803**-WF 1.44MB 340MB 8MB None
FR-803**-WC 1.44MB 540MB 8MB None
FR-804WW-A9 - - - None
FR-804**-WA 1.44MB 170MB 4MB None
FR-804**-WF 1.44MB 340MB 8MB None
FR-804**-WC 1.44MB 540MB 8MB None
FR-806WW-A9 - - - None
FR-806**-WA 1.44MB 170MB 4MB None
FR-806**-WF 1.44MB 340MB 8MB None
FR-806**-WC 1.44MB 540MB 8MB None
FR-808WW-A9 - - - None
FR-808**-WA 1.44MB 170MB 4MB None
FR-808**-WF 1.44MB 340MB 8MB None
FR-808**-WC 1.44MB 540MB 8MB None
FR-809WW-A9 - - - None
FR-809**-WA 1.44MB 170MB 4MB None
FR-809**-WF 1.44MB 340MB 8MB None
FR-809**-WC 1.44MB 540MB 8MB None
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Digital DECpc LPx/LPx+ Utilities & Configuration
Chapter 2 System Utilities &
Configuration
System Utilities
The computer comes with an MS-DOS bootable System Utilities diskette containing the following
programs:
♦ SETUP.EXE ¾ allows to run an MS-DOS executable version of the BIOS Setup utility.
♦ EPP3SMC.EXE allows to configure the printer to operate in EPP (Enhanced Parallel
♦ KP.EXE ¾ allows to set a keyboard and mouse password.
♦ UPGRADE.EXE ¾ allows to upgrade or restore the computer's BIOS via Flash ROM
(DECpc LPx 560/566).
Port) mode (DECpc LPx/LPx+).
When unfamiliar with utility programs and video drivers and their uses, carefully read and understand this
chapter before attempting to use the System Utilities Diskette.
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Utilities & Configuration Digital DECpc LPx/LPx+
If this is the first time using the System Utilities diskette, it is recommended to follow
the procedures in the order given.
Using the System Utilities Diskette
The System Utilities Diskette allows to:
♦ Run an MS-DOS executable version of the computer's BIOS Setup utility (SETUP.EXE).
♦ Set a keyboard and mouse password (KP.EXE).
♦ Upgrade or restore the computer's BIOS (UPGRADE.EXE) (DECpc LPx 560/566).
NOTE
1) Make a backup copy of System Utilities diskette and then store original in a safe place.
2) Turn on or reboot the computer.
3) Insert backup copy of System Utilities diskette into drive A.
4) Run UPGRADE.EXE, SETUP.EXE, or KP.EXE.
5) Remove System Utilities diskette and then reboot computer so changes immediately take effect.
Running SETUP.EXE
SETUP.EXE allows to select and permanently store information about the computer's installed hardware
and software in the battery-backed memory of CMOS RAM. This information takes effect each time the
computer boots and can be changed each time you run Setup.
To access SETUP.EXE:
1) Turn on the computer.
2) Allow POST to complete.
If an error message appears on the screen, refer to chapter 4,“Troubleshooting”.
3) Insert the backup copy of the System Utilities diskette into drive A.
4) Type a:setup then press [Enter].
Page 1 of Setup appears.
5) Press the right arrow key to move the cursor to the ROM Based Setup option. Change the setting to
Enable/Disable.
6) Exit SETUP.EXE (saving the changes).
7) Remove the backup copy of the System Utilities diskette and then reboot the computer.
EPP3SMC.EXE
EPP3SMC.EXE can be executed as an MS-DOS command or added to the CONFIG.SYS file as a device
driver. In either case, use the BIOS Setup utility to set the parallel port to EPP mode.
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Digital DECpc LPx/LPx+ Utilities & Configuration
When you create a keyboard and mouse password, the characters do not appear on
the screen as you type them. Each time you enter or change a keyboard and mouse
password, the characters also do not appear on the screen as you type them.
Other applications, such as QEMM386 V6.01, use the character string kp to invoke or
enable commands. When having such an application installed, add the /nic parameter
when to set a keyboard and mouse password using the Keyboard Password utility.
KP.EXE
KP.EXE is an MS-DOS executable file that allows to set a password for the keyboard and mouse without
turning off the computer. When setting this password, the keyboard and mouse can not process any input
other than the current keyboard and mouse password. Setting this password secures the computer against
unauthorized access while the computer remains turned on.
When a keyboard and mouse password has been set, each time the computer is turned off, the password is
deleted. When turning on the computer again, a new keyboard and mouse password have to be set. When
a power-on password has been set, the power-on password becomes the keyboard and mouse password.
Keyboard and mouse passwords can have as many as seven upper or lower case keyboard characters and
are recorded exactly as they are entered. For example, when using the 6 from the typewriter key section of
the keyboard, the 6 from the numeric keypad cannot be substituted.
NOTE
Copying KP.EXE onto Hard Disk
1) Turn on the computer and allow POST to complete without error.
2) Insert the backup copy of the System Utilities diskette into drive A.
3) At the MS-DOS prompt type a: then press [Enter] to access drive A.
4) At the A:\> prompt type copy kp.exe c: then press [Enter].
KP.EXE is then copied onto drive C of the computer's hard disk.
5) Remove the backup copy of the System Utilities diskette.
Setting a Keyboard and Mouse Password
After copying KP.EXE onto the computer's hard disk, a keyboard and mouse password can be set using the
following procedure:
1) At the MS-DOS prompt type kp then press [Enter]. You are then prompted to enter a password.
NOTE
2) Enter a password then press [Enter]. You are then prompted to type the password again to verify it.
3) Enter the password then press [Enter]. The keyboard has been locked.
4) To unlock the keyboard, enter the password and press [Enter].
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Utilities & Configuration Digital DECpc LPx/LPx+
Configuring the Computer
The information listed below explains how to configure the computer using the BIOS Setup utility. If the
computer was delivered with factory-installed software, it has already been configured.
When familiar with utility programs and their uses, refer to the material in the options table while updating
the computer. Otherwise, carefully read and understand all the information in these topics before
attempting to modify the computer's configuration settings.
Running the BIOS Setup Utility
The BIOS Setup utility enables to select and permanently store information about the computer's hardware
and software in the battery-backed memory of CMOS RAM. This information takes effect each time the
computer boots and can be changed each time you run setup.
Use the BIOS Setup utility when experiencing problems with the hard disk or when there is a need to
reconfigure the computer. In addition, the BIOS Setup utility should be used to modify the configuration
after adding or removing hardware, or changing computer settings.
To run the BIOS Setup utility:
1) Turn on the computer and allow POST to complete.
2) Make a note of any configuration errors listed, and then press [F1] to display the first of three setup
screens.
3) Follow the instructions on screen and any on-line help pop-up screens to configure the computer.
UPGRADE.EXE (DECpc LPx 560/566)
All computers have BIOS software in a read-only, non-volatile memory (ROM) chip. This BIOS initializes
hardware and boots the operating system when the computer is turned on. The BIOS also provides access
to other services such as keyboard and disk drives.
The computer comes equipped with flash memory. This means that the computer's BIOS can be restored
simply by running the UPGRADE.EXE utility contained on the supplied System Utilities diskette. You can
also upgrade the computer's BIOS to future releases by running UPGRADE.EXE along with any flash
BIOS update diskette if necessary.
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Digital DECpc LPx/LPx+ Utilities & Configuration
Before attempting to upgrade the flash BIOS, ensure that J35 is set correctly. To
perform a flash BIOS upgrade, J35 must be set to enable. After the upgrade, make
sure J35 is set back to disable as a security measure (if desired).
Before Using UPGRADE.EXE (DECpc LPx 560/566)
When not familiar with utility programs and their uses, carefully read and understand the following
information before attempting to use UPGRADE.EXE:
Have the following items available before you begin:
♦ Blank formatted diskette
♦ System Utilities diskette (supplied with the computer)
♦ Recovery diskette
NOTE
Creating a Recovery Diskette (DECpc LPx 560/566)
1) Insert the backup copy of the System Utilities diskette into drive A.
2) Turn on the computer.
3) At MS-DOS prompt, type a:upgrade, and then press [Enter].
This invokes UPGRADE.EXE. Also, the following menu items appear on the screen:
◊ Make Recovery Diskette from Flash
◊ Make Recovery Diskette from Image File
◊ Upgrade Flash from Image File
◊ Save Flash to Image File
◊ Compare Flash to Image File
◊ BIOS Information
◊ Exit
For additional on-line help, press [F1].
4) Select the Make Recovery Diskette from Flash menu option.
The message, "Please select the diskette drive that you will use to create a Flash Recovery
Diskette, or select "Cancel" to abort", appears on screen.
5) Press [Tab] or the up and down arrow keys to the highlight diskette drive you want to use, then press
[Enter]. Drive A is the default diskette drive.
The message, "Insert a formatted diskette into drive A. The contents of this diskette will be lost!
and replaced with system recovery software and the BIOS image you specified. Select "Continue"
to start writing the recovery diskette, or "Cancel" to abort," appears on screen.
6) Insert a blank (formatted) diskette in drive A, and select Continue to proceed with creating a recovery
diskette. A message window notifies you when it completes. Press any key to continue.
7) Remove the recovery diskette and store it in a safe place.
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Utilities & Configuration Digital DECpc LPx/LPx+
If the BIOS resides on a diskette, use that diskette to upgrade the BIOS.
Upgrading the Computer's BIOS (DECpc LPx 560/566)
1) Insert the backup copy of the System Utilities diskette into drive A.
2) Select the Upgrade Flash from Image File menu option.
You are then prompted to select a BIOS image file to program into flash memory.
NOTE
3) Press [Enter] to list a directory of .BIN (BIOS image) files. Select the desired image file.
The message "Your BIOS will now be replaced by the new BIOS image you selected. Select
"Program" to start, or "Cancel" to abort. Keep in mind that programming a new BIOS into Flash
memory requires a fair amount of power. If you are running on battery power you should have a
full charge!" appears on screen.
4) Press [Enter] to continue programming the new BIOS into flash memory.
The message "DO NOT TURN OFF THE POWER" appears on screen.
The flash memory is erased, and replaced by a new BIOS. Depending on the size of flash memory,
programming takes 20-40 seconds. When programming completes, a message briefly appears on
screen, then the computer attempts to reboot.
5) Remove the backup copy of the System Utilities diskette and allow the computer to reboot without
error.
If an error occurs, a siren sounds while the computer attempts to boot, signaling that the flash memory
is corrupted. If this occurs, insert the recovery diskette into drive A or B so the original BIOS can be
copied back into flash memory.
If the computer does not reboot and the siren does not sound, turn off the computer. Set the main
logic board jumper J34 to recovery mode. This forces a BIOS recovery process.
6) Insert the backup copy of the System Utilities diskette into drive A, invoke UPGRADE.EXE, and
then select the Compare Flash to Image File menu option.
The message, "Select BIOS Image File Name to compare against flash memory," appears on screen.
7) Press [Enter] to display a list of .BIN (BIOS image) files. Select the desired .BIN file to compare
with flash memory.
A message window shows whether flash memory contains the same BIOS as the disk file.
Press any key to continue.
If applicable, select the Save Flash to Image File menu option. This option reads BIOS out of flash
memory and stores it on a disk file. A valid image file can be used with other upgrade commands that
need an image file. The default name for the image file is DEFAULT.BIN. A different file name can
be typed if you do not want to use the default name.
9) Exit UPGRADE.EXE and remove the backup copy of the System Utilities diskette.
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Digital DECpc LPx/LPx+ Utilities & Configuration
Helpful Hints
♦ Several keyboard function keys and numeric keypad keys are assigned to help selecting menus and
options, changing option values, and displaying help information. These keys are displayed at the
bottom of each setup configuration screen.
♦ On-line help pop-up screens are available at anytime during the setup process. These screens provide
information about highlighted options and, in some cases, offer suggestions on how to choose the
correct field for a selected option. To access these screens, highlight an option and press [F1].
♦ Press [F2] to display important computer information. Record all pertinent information.
♦ Press [Esc] then press [F4] to exit the BIOS Setup utility and reboot the computer so changes
immediately take effect.
♦ Press [Esc] then press [F6] to exit the BIOS Setup utility without changes taking effect.
♦ Press [Esc] then press [F5] to set all BIOS Setup utility options to their default values.
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Utilities & Configuration Digital DECpc LPx/LPx+
Menu Field
Settings
Comments
BIOS Setup Utility Options
System time
System date
Language
Diskette A /
Diskette B
Hard disk 1 /
hard disk 2
Base memory
Extended
memory
Video card
Keyboard
NumLock on
boot
Password
(LPx)
Current time Displays the current time.
Current date Displays the current date.
English
Français
Deutsch
Italiano
Español
3.5", 1.44 MB
3.5", 2.88 MB
Not Installed
5.25", 360 KB
5.25", 1.2 MB
3.5", 720 KB
Drive types 1
through 49
640 KB Displays the size of base (conventional) memory.
3072 KB Displays the current amount of extended memory.
VGA or EGA
CGA 40 Col.
CGA 80 Col.
Monochrome
Not Installed
Installed
Not Installed
On
Off
Not Installed
Installed
Sets the desired language.
DECpc LPx 560/566: The language field in SETUP.EXE contains all
the languages listed as possible settings. The BIOS Setup utility has
English only. Run the UPGRADE.EXE program from the System
Utilities diskette to load one of the five languages available on the
multilingual BIOS diskette. The BIOS Setup utility appears as an F1
prompt each time the computer is booted.
Sets the size and density of diskette drives.
Enables hard drive size and specific parameters from a predetermined
list of drive types. Drive types 2 and 3 or 48 and 49 are user definable
for hard drives not listed in the BIOS drive table.
Note: This option allows to disable or configure the computer for the
IDE hard disk drives that are installed. There is the option of manually
selecting drive types or using an auto-detect feature. To use the autodetect feature, first select either drive types 2 and 3 or drive types 48
and 49. Once selected, you are prompted to execute the auto-detect
feature by press the [Enter] key.
Note: The main logic board reserves the first 1024 KB of address
space for computer use. Base memory (640 KB) is first assigned to
the operating system. The remaining 384 KB is assigned to shadow
main logic board BIOS, video BIOS, or for other computer use.
Sets the video controller type.
Enables or disables the keyboard when using the computer as a
network server.
Note: The computer must initially be set up with a keyboard.
Enables or disables the NumLock feature each time the computer
boots.
Enables or disables a power-on password.
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Digital DECpc LPx/LPx+ Utilities & Configuration
Menu Field
Settings
Comments
BIOS Setup Utility Options (continued)
Password
(LPx+)
Password
(LPx 560/566)
ROM based
setup
Mouse port
Parallel port
Serial port 1
Setup only
System only
System and
setup
Not Installed
System poweron password
Setup password
System poweron and setup
password
Not Installed
Enabled
Disabled
Enabled
Disabled
Enabled at:
378h-37Ah
(IRQ7)
278h-27Ah
(IRQ7)
3BCh-3BEh
(IRQ7)
Disabled
Bi-directional
mode
Compatible
mode
Extended
(2)
mode
EPP mode
ECP mode
(1)
(1)
Enabled at:
3F8h-3FFh
(IRQ4)
2F8h-2FFh
(IRQ3)
3E8h-3EFh
(IRQ4)
2E8h-2EFh
(IRQ3)
Disabled
Enables or disables a system power-on and/or BIOS setup password.
Enables or disables a system power-on and/or BIOS setup password.
Enables or disables the ROM base setup utility.
Note: Disabling this option prevents unauthorized personnel from
changing any computer's configuration parameters.
Enables the mouse port and assigns IRQ12.
Disables the mouse port and frees up IRQ12 for option use.
Enables or disables any desired onboard printer port at the specified
address.
Allows to select between standard printer and bi-directional
applications.
Allows to select between enhanced parallel port (EPP) and extended
capabilities port (ECP) applications.
Enables or disables any desired onboard serial port at the specified
address.
The computer logically assigns LPTx and COMx names to:
Parallel ports in the address order 378h and 278h
Serial ports in the address order 3F8h, 2F8h, 3E8h, and
2E8h
This occurs during each boot process. For example, when the serial
port is disabled that is assigned to 3F8h as COM1, during the next
boot cycle the computer reassigns the name COM1 to the next
enabled serial port in the sequence.
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Utilities & Configuration Digital DECpc LPx/LPx+
Menu Field
Settings
Comments
BIOS Setup Utility Options (continued)
Serial port 2
Diskette drive
Exchange
diskette drives
Diskette write
protection
(1)
IDE hard disk
drives
HDD user
definable
types
Large drive
addressing
(1)
Enabled at:
2F8h-2FFh
(IRQ3)
3E8h-3EFh
(IRQ4)
2E8h-2EFh
(IRQ3)
Disabled
3F8h-3FFh
(IRQ4)
Enabled
Disabled
Disabled
Enabled
Disabled
Enabled
Enabled
Disabled
Types 2 and 3
Types 48 and
49
Standard
LBA convert
Enables or disables any desired onboard serial port at the specified
address.
Enables or disables the onboard diskette drive controller.
Allows to logically exchange physical diskette drive designations.
Enables or disables the selected diskette drive's write protect option.
Note: This option allows to write protect any installed diskette drive.
Enabling this option prevents unauthorized personnel from writing
data to a diskette.
Enables or disables the onboard IDE disk drive controller.
Disable this option when having a SCSI controller installed in one of
the expansion slots.
The BIOS Setup utility allows types 2 and 3 or types 48 and 49 to be
user definable.
Drive type 48 or 49 information is aliased to drive type 2 or 3 when
application software does not recognize drive types above 47.
Auto-detection of IDE drive parameter is supported in types 2 and 3
and types 48 and 49.
Some operating systems do not recognize hard disk drive types above
29. Auto-detection of IDE drive parameter is supported in types 2 and
3 and types 48 and 49.
The drives cylinder/ head/ sector values are used by the computers
BIOS and operating system (hard disk drives up to 528 MB).
Allows the computers BIOS to convert the logical cylinder/ head/
sector used by the operating system to the drives cylinder/ head/
sector value (hard disk drives greater than 528 MB).
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Digital DECpc LPx/LPx+ Utilities & Configuration
Menu Field
Settings
Comments
BIOS Setup Utility Options (continued)
HDD data
transfer
(1)
method
Boot from
diskette A
Boot from
hard disk C
CPU speed
Primary cache
Standard PIO
Auto optimum
Enabled
Disabled
Enabled
Disabled
Fast
Slow
Enabled
Disabled
Allows for a standard, compatible data transfer method (one data
block per interrupt).
Allows the computer's BIOS to automatically set up the installed drive
for optimum performance (multiple data blocks per interrupt).
Note: This option lets you take advantage of new IDE hard disk drive
technologies. Setting this option to Auto Optimum allows the
computer's BIOS to interrogate and automatically set up any installed
IDE hard disk drive for optimum performance.
Enables or disables drive A as the logical boot device.
Note: The computer comes from the factory with options Boot From
Diskette A and Boot From Hard Disk C enabled. This means that
each time the computer is turned on or reset, it attempts to first boot
from diskette A and then from hard disk drive C. When choosing to
change the computer’s boot sequence, be aware of the following:
When a second diskette drive has been installed, you can choose
which one to boot from, using the "Exchange Diskette Drives" setup
option.
Enables or disables drive C as the logical boot device.
Determines the speed used by the computer each time it is turned on
or rebooted.
Note: This option determines the speed used by the computer each
time it is turned on or rebooted.
Fast¾ is the normal speed and causes the CPU to run at its rated
speed.
Slow¾ (equivalent to 8 MHz) is used to reduce the effective CPU
speed to be compatible with some speed-dependent application
programs.
If an application program does not run correctly at full speed, try
disabling all caches or changing the CPU speed to slow.
Computer performance will be severely degraded while operating in
slow mode.
Enables or disables the CPU's internal (primary) cache.
Note: Enabling the cache controller significantly improves computer
performance by reducing the average number of wait states seen by
the microprocessor.
However, in some instances you might want to disable the primary
cache, for example, while using time-dependent software. In this
instance, the computer can operate but not at full potential.
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Utilities & Configuration Digital DECpc LPx/LPx+
Menu Field
Settings
Comments
BIOS Setup Utility Options (continued)
Secondary
cache
AT bus
(1) (2)
space
Enabled
Disabled
Enabled WT
Enabled WB
(2)
(2)
Disabled
F80000h,
.5MB
F00000h, 1MB
E00000h, 1MB
E00000h, 2MB
C00000h, 4MB
Enables or disables the computer's external (secondary) cache.
Note: Enabling the secondary cache significantly improves computer
performance by reducing the average number of wait states seen by
the microprocessor.
However, in some instances, you might want to disable the secondary
cache, for example, while using time-dependent software. In this
instance, the computer can operate but not at full potential.
Note: When no secondary cache has been installed, make sure this
option is set to disabled.
Enables or disables the computer's external cache in WT (Write
Through) or WB (Write Back) mode.
CAUTION: If the computer contains a Pentium CPU module, ensure
that this option is set to Write-Through mode.
Memory hole not available, upper memory is contiguous.
Sets the memory hole at address F80000 with .5 MB memory
available.
Sets the memory hole at address F00000 with 1 MB memory
available.
Sets the memory hole at address E00000 with 1 MB memory
available.
Sets the memory hole at address E00000 with 2 MB memory
available.
Sets the memory hole at address C00000 with 4 MB memory
available.
Note: This option allows to select a memory hole in upper memory
(between 1 MB and 16 MB) to be used by optional network expansion
boards or optional software using frame-grab memory. Selecting an
available memory hole range avoids memory address conflicts by
mapping the physical memory that has been addressed to the region to
the top of main memory.
Refer to the user documentation supplied with the optional network
expansion board or optional software to see if a specific memory
range is required for proper operation. Also make sure the operating
system can support the memory hole selections prior to enabling this
feature.
Banyan Vines users must select AT Bus Space E00000h, 1 MB to
eliminate memory address conflicts.
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Digital DECpc LPx/LPx+ Utilities & Configuration
Menu Field
Settings
Comments
BIOS Setup Utility Options (continued)
Cache BIOS
ROM
Shadow video
ROM
E00000h
selection
Cache video
ROM
Shadow 32K
at C8000
Shadow 32K
at D0000
(1) (2)
(1) (2)
Enabled
Disabled
Enabled
Disabled
Local memory
AT bus
Enabled
Disabled
Enabled
Disabled
Enabled
Disabled
Allows to enable or disable a caching request for the computer's
BIOS.
Note: This option allows the computer's BIOS to be cached in the
primary cache and secondary cache (if installed). This increases
computer performance because BIOS instructions are executed in
cache instead of RAM.
Enables or disables the computer's shadow video ROM option.
Note: The main logic board reserves an area of DRAM for a copy of
video BIOS ROM. This DRAM called "shadow memory" is writeprotected and has the same addresses as the video BIOS ROM
locations. When the video BIOS ROM is shadowed, the ROM
information is copied into an appropriate area in DRAM. This
increases the computer's performance because the video BIOS
instructions are in fast DRAM instead of ROM.
Allows to select the E00000h - EFFFFFh memory allocation.
Note: This option allows to enable or disable the E00000h to
EFFFFFh DRAM range. When using optional software, such as
frame grabbers and/or certain LAN network expansion boards, it may
be necessary to disable this DRAM range and force it to the ISA bus
to avoid memory conflicts. Refer to the documentation supplied with
the software to see if this memory range is required for proper
operation.
Enables or disables the computer's cache video ROM option.
This option allows the computer to cache video BIOS information.
Caching the computer's video ROM provides greater performance at
the VGA level, however, when running certain application software,
conflicts might occur.
Enables or disables the computer's C8000 shadow option.
Note: This option allows the computer to shadow any device BIOS
located in the C8000 address space. Shadowing device BIOS in this
area increases the computer's overall performance.
Refer to the device's documentation to determine if this function can
be performed.
Enables or disables the computer's D0000 shadow option.
Note: This option allows the computer to shadow any device BIOS
located in the D0000 address space. Shadowing device BIOS in this
area increases the computer's overall performance.
Refer to the device's documentation to determine if this function can
be performed.
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Utilities & Configuration Digital DECpc LPx/LPx+
Menu Field
Settings
Comments
BIOS Setup Utility Options (continued)
Shadow 32K
at D8000
(1) (2)
512KB-640
KB
mapping
(2)
PCI device
Power
(1)
mngmnt
Monitor Off
(1)
Timer
Enabled
Disabled
Main memory
PCI/ISA
(2)
Enable device:
Enabled
Disabled
Device IRQ:
None
IRQ5
IRQ9
IRQ10
IRQ15
IRQ14
Enable master:
Enabled
Disabled
Latency timer
Default
Disabled
Enabled
Disabled
1 min.
5 min.
10 min.
15 min.
20 min.
25 min.
30 min.
Enables or disables the computer's D8000 shadow option.
Note: This option allows the computer to shadow any device BIOS
located in the D8000 address space. Shadowing device BIOS in this
area increases the computer's overall performance.
Refer to the device's documentation to determine if this function can
be performed.
Allows to map the memory region between 512KB to 640KB to the
computer's main memory.
Allows to map the memory region between 512KB and 640KB to the
PCI or ISA bus.
Note: When this option is enabled, the amount of conventional
memory under MS-DOS is reduced by 128 KB.
Allows to individually enable or disable each PCI slot.
Allows to individually set an IRQ default for each PCI slot.
Allows to enable or disable a PCI device that requires master
capability.
Allows to set the PCI latency timer (in PCI clocks) for each PCI
device.
CAUTION: The PCI Device selections for factory installed PCI
expansion boards should stay at the factory default settings.
Modifications can cause computer failure.
Enables or disables the computer's power management features.
Allows to disable the monitor off feature, or, after a set period of
keyboard or mouse inactivity, allows to place the monitor in an off
state (one-half power saving state).
When placed in the off state, the monitor resumes its full-power
capabilities with minimal delays.
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Digital DECpc LPx/LPx+ Utilities & Configuration
Menu Field
Settings
Comments
BIOS Setup Utility Options (continued)
Monitor
Suspend
(1)
Timer
Hard Disk
Suspend
(1)
Timer
System
Suspend
(1)
Timer
(1)
(LPx+ only).
(2)
(LPx 560/566 only).
Disabled
1 min.
5 min.
10 min.
15 min.
20 min.
25 min.
30 min.
Disabled
Enabled
Disabled
30 min.
1 hour
1.5 hours
2 hours
3 hours
6 hours
12 hours
Allows to disable the monitor suspend feature, or, after a set period of
keyboard, mouse, or keyboard controller inactivity, allows to place the
monitor in a suspend state (minimum power saving state).
When placed in the suspend state, the monitor instantaneously
resumes to full-power capabilities.
Allows to disable or enable the hard disk suspend feature, or, after a
set period of disk drive inactivity, allows the hard disk drive to spin
down it's motor to save power.
Note: This option allows to place the hard disk drive in suspend
power saving mode. When enabled, and after approximately 20
minutes of hard disk drive inactivity, the hard disk drives spindle and
actuator motor will spin down with the drive head parked in the
landing zone until disk activity resumes.
Allows to disable the system suspend feature, or, after a set period of
computer inactivity, allows to place the computer in a suspend state
(maximum power saving state).
Note: This option allows to place the computer in suspend power
saving mode. While in suspend, the computer enters the maximum
power saving mode. This means the monitor is off, the hard disk
drive enters its suspend state, the CPU clock stops, and the cooling fan
stops. Note that computer interrupts can break the system suspend
state with the exception of IRQ 0 and 8.
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Digital DECpc LPx/LPx+ Service Procedures
Do NOT wear ESD straps when working on terminals,monitors or power supplies
when AC power is applied. This is to avoid the hazard of electrical shock.
Chapter 3 Service Procedures
Safety Requirements
WARNING
Static electricity collects on non-conductors such as paper, cloth, or plastic. A static
discharge can be damaging even though you often cannot see or feel it.
The following safety precautions must be observed to insure product and personal safety and prevent
damage to circuit boards and/or components:
♦ Always wear an ESD wrist strap when handling ESD sensitive material and be sure it is properly
connected.
♦ Keep circuit boards and components away from non-conductors.
♦ Keep clothing away from circuit boards and components.
♦ Keep circuit boards in anti-static bags.
♦ Be cautious when AC power is exposed when working on an assembly.
♦ Always use an ISOLATION TRANSFORMER when diagnosing any terminals, monitors or power
supplies when AC power is applied.
♦ Be cautious of very high voltage potentials when working with monitors.
There should be an approved insulating mat (for technician safety) in front of any workbench where
monitors, terminals or power modules are being serviced when power is applied.
NOTE
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Service Procedures Digital DECpc LPx/LPx+
Recommended Tools
The following tools will be needed for servicing Digital PC systems. Note that test equipment must be in
calibration.
♦ Multimeter (4 1/2 digit)
♦ A philips screwdriver
♦ An antistatic wrist strap
Other Needed Materials
Cleaning agent should be an all purpose cleaner that is used in-house.
Required Special Tools
None.
Remedial Diagnostic Test Software
♦ QAPLUS/fe , PC Advanced Diagnostic Software, latest version.
Partnumber : 22-00908-06
Recommended Virus Detection and Cleanup Software
♦ F-PROT, Virus Detection and Cleanup Software, latest version.
Network locations:
32 MCS Logistics Engineering - Nijmegen
North America, South America, Australia and New Zealand:
MINOTR::USER6:[VIRUS.F-PROT}
Europe, Africa, Middle and Far East:
VARDAF::EUROPUB:[VIRUS_SCANNER.F-PROT]
Page 30
Digital DECpc LPx/LPx+ Service Procedures
ECO/FCO Information
BIOS version information.
Refer to the Digital DECpc Bulletin Board Support , for the latest information on BIOS upgrades
Network locations:
North America, South America, Australia and New Zealand:
PCBUHD::DKB300:[WC30.BBSFILES]
Europe, Africa, Middle and Far East:
SUTRA::D6:[PUBLIC].
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Service Procedures Digital DECpc LPx/LPx+
Unlocking and Removing Cover
WARNING
You might injure yourself or damage the computer when attempting to remove the
cover before unplugging ac and monitor power cords.
Before removing the outside cover, do the following:
1) Turn off power to all external devices connected to computer.
2) Turn computer off.
3) Unplug power cord from wall outlet.
4) Disconnect power cord and monitor cord from computer.
To remove the outside cover:
1) Unlock outside cover.
2) Remove four retaining
screws located at rear of
computer.
3) Carefully slide outside
cover toward rear of chassis
until it clears lip of front
bezel. Carefully lift outside
cover from chassis.
Figure 3 - 1 Removing the Outside Cover
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Digital DECpc LPx/LPx+ Service Procedures
Legend
Description
Computer Components
A
B
C
D
E
F
G
Power supply
Six ISA expansion slots
Main logic board
3½-inch diskette drive
Front access drive bays
Internal drive bay
Two VESA-compliant VL-bus (local bus) expansion slots
Figure 3 - 2 LPX Computer Model Components
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Service Procedures Digital DECpc LPx/LPx+
Expansion Slot
Slot Type
Description
Expansion Slots
The DECpc LPx/LPx+ computer contains six expansion board slots that support standard 16-bit ISA
expansion boards and 32-bit VESA-compliant VL-bus (local bus) expansion boards.
The DECpc LPx 560/566 computer contains seven expansion board slots. Four of the slots support
industry-standard 16-bit ISA expansion boards. The remaining three expansion slots support 32-bit PCI
local bus expansion boards.
Expansion slots for LPx Models
The table below gives specific information about the expansion slots for the LPx computer.
J8 - J11
J6 - J7
ISA Supports industry-standard 16-bit ISA.
ISA / VL-bus Supports industry-standard 16-bit ISA expansion boards
LPx Expansion Slots
or 32-bit VL-bus expansion boards.
Figure 3 - 3 LPx Expansion Slots
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Digital DECpc LPx/LPx+ Service Procedures
Expansion Slot
Slot Type
Description
Expansion slots for LPx+ Models
The table below gives specific information about the expansion slots for the LPx+ computer.
J29 - J32
J33 - J34
ISA Supports industry-standard 16-bit ISA.
ISA / VL-bus Supports industry-standard 16-bit ISA expansion boards or 32-bit
LPx+ Expansion Slots
VL-bus expansion boards.
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Figure 3 - 4 LPx+ Expansion Slots
Page 35
Service Procedures Digital DECpc LPx/LPx+
Expansion Slot
Slot Type
Description
Expansion slots for LPx 560/566 Models
The table below gives specific information about the expansion slots for the LPx 560/566 computer.
J7, J8, J9
J6
J11/PCI slot 1
J12/PCI slot 2
J13/PCI slot 3
ISA Supports industry-standard 16-bit ISA expansion boards.
ISA Supports industry-standard 16-bit ISA expansion boards.
Designated as a shared slot with PCI slot J13.
PCI Supports non-bus mastering 32-bit PCI expansion boards.
Digital recommends that you install the 32-bit PCI video adapter
in this slot.
PCI Supports bus mastering 32-bit PCI expansion boards.
Digital recommends to install 32-bit bus mastering PCI expansion
boards in this slot.
PCI Supports bus mastering 32-bit PCI expansion boards.
Designated as a shared slot with ISA slot J6.
Px 560/566 Expansion Slots
Figure 3 - 5 LPx 560/566 Expansion Slots
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Digital DECpc LPx/LPx+ Service Procedures
Installing Expansion Boards
To install an ISA or VL-bus expansion board:
1) Turn off the computer.
2) Disconnect external devices, ac power, and monitor power.
3) Unlock and remove outside cover.
4) Unscrew and remove the metal filler plate for the desired expansion slot.
5) Insert new expansion board into socket.
Push expansion board firmly into place.
6) Secure expansion board to slot with screw removed in step 4.
7) Replace and lock outside cover.
8) Connect external devices and restore power.
9) Run BIOS setup utility to configure computer.
Figure 3 - 6 Installing Expansion Slots
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Service Procedures Digital DECpc LPx/LPx+
Main Logic Board Jumpers
Jumper pins allow to set specific computer parameters. They are set by changing the pin location of jumper
blocks. Note that the square pin of each jumper block is pin 1. A jumper block is a small plastic-encased
conductor (shorting plug) that slips over the pins. To change a jumper setting, remove the jumper from its
current location. Place the jumper over the two pins designated for the desired setting. Press the jumper
evenly onto the pins. Be careful not to bend the pins.
CAUTION
Do not touch any electronic component unless you are safely grounded. Wear a
grounded wrist strap or touch an exposed metal part of the system box chassis. A static
discharge from your fingers can result in permanent damage to electronic components.
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Digital DECpc LPx/LPx+ Service Procedures
Feature
Description
Setting
LPx Main Logic Board Jumper Settings
Settings shown in bold italics are factory defaults.
Factory test
Video display type
CPU clock input
Cache size select
Recovery mode
VL bus write wait state
Reset switch
RDY signal type
Normal
MFG test
Mono monitor
Color monitor
50 Mhz
40 MHz
33 MHz
25 MHz
0 KB
128 KB
256 KB
Recovery mode
Normal operation
Zero wait write
One wait write
Enable
Disable
VLRDY->CPURDY (VL bus
ready connects to CPU bus
ready)
VLRDY->LRDY (VL bus ready
synchronized through chipset
J16, open
J16, jumpered
J15, open
J15, jumpered
J24, open
J25, open
J26, open
J24, open
J25, open
J26, jumpered
J24, jumpered
J25, open
J26, jumpered
J24, jumpered
J25, jumpered
J26, open
J35, open
J36, open
J37, open
J38, open
J35, pins 1 and 2 jumpered
J36, pins 1 and 2 jumpered
J37, pins 1 and 2 jumpered
J38, pins 1 and 2 jumpered
J35, pins 2 and 3 jumpered
J36, pins 2 and 3 jumpered
J37, pins 2 and 3 jumpered
J38, pins 2 and 3 jumpered
J14, jumpered
J14, open
J27, pins 1 and 2 jumpered
J27, pins 2 and 3, jumpered
J33, jumpered
J33, open
J28, pins 1 and 2 jumpered
J28, pins 2 and 3 jumpered
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Service Procedures Digital DECpc LPx/LPx+
LPx Main Logic Board Jumper Locations
Figure 3 - 7 LPx Main Logic Board Jumper Locations
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Digital DECpc LPx/LPx+ Service Procedures
Feature
Description
Setting
LPx+ Main Logic Board Jumper Settings
Settings shown in bold italics are factory defaults.
Password clear (MFG testing)
Video display type
CPU clock input
Cache size select
Factory setting
VL bus write wait state
CPU type
Reset switch
RDY signal type
Normal(1)
Password clear (MFG test)
Mono monitor
Color monitor
50 MHz
40 MHz
33 MHz
25 MHz
0 KB
128 KB
256 KB
Enabled J36, jumpered
Zero wait write
One wait write
P24T,P24D
SX,DX
Enable
Disable
VLRDY->CPURDY (VL bus
ready connects to CPU bus
ready)
VLRDY->LRDY (VL bus ready
synchronized through chipset
J15, open
J15, jumpered
J14, open
J14, jumpered
J1, open
J2, open
J3, open
J1, jumpered
J2, open
J3, open
J1, jumpered
J2, open
J3, jumpered
J1, open
J2, jumpered
J3, jumpered
J4, open
J5, open
J6, open
J7, open
J4, pins 1 and 2 jumpered
J5, pins 1 and 2 jumpered
J6, pins 1 and 2 jumpered
J7, pins 1 and 2 jumpered
J4, pins 2 and 3 jumpered
J5, pins 2 and 3 jumpered
J6, pins 2 and 3 jumpered
J7, pins 2 and 3 jumpered
J28, pins 1 and 2 jumpered
J28, pins 2 and 3, jumpered
J35, pins 1 and 2 jumpered
J35, pins 2 and 3 jumpered
J24, jumpered
J24, open
J44, pins 1 and 2 jumpered
J44, pins 2 and 3 jumpered
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Service Procedures Digital DECpc LPx/LPx+
LPx+ Main Logic Board Jumper Locations
Figure 3 - 8 LPx+ Main Logic Board Jumper Locations
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Digital DECpc LPx/LPx+ Service Procedures
The HD Active Display connector (J44) is used for external SCSI/IDE adapters to
display hard drive activity.
Feature
Description
Setting
LPx 560/566 Main Logic Board Jumper Settings
NOTE
CAUTION
Do not use the password clear jumper (J32); use instead the clear CMOS jumper (J29).
Using the clear CMOS jumper then sets all other CMOS settings back to the defaults.
Settings shown in bold italics are factory defaults.
Flash ROM upgrade
Recovery mode
Display type
Password clear
Clear CMOS to default
settings
CPU type
Reprogram boot block
Enable
Disable
Normal
Recovery mode
Mono
Color
Normal
Password clear (MFG test)
Normal operation
Clear CMOS
Intel
Alpha
Disable
Enable
J35, jumpered
J35, open
J34, open
J34, jumpered
J33, open
J33, jumpered
J32, open
J32, jumpered
J29, open
J29, jumpered
J39, open
J39, jumpered
J40, pins 1 & 2 jumpered
J40, pins 2 & 3 jumpered
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Service Procedures Digital DECpc LPx/LPx+
LPx 560/566 Main Logic Board Jumper Locations
Figure 3 - 9 LPx 560/566 Main Logic Board Jumper Locations
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Digital DECpc LPx/LPx+ Service Procedures
Feature
Description
Setting
LPx 560/566 CPU Board Jumper Settings
CPU clock input
(Default depends on the CPU
installed at the factory.)
60 MHz
66 MHz
LPx 560/566 CPU Board Jumper Locations
J5, pins 2 and 3 jumpered
J5, pins 1 and 2 jumpered
Figure 3 - 10 LPx 560/566 CPU Board Jumper Locations
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Service Procedures Digital DECpc LPx/LPx+
Bank 0
Bank 1
Bank 2
Bank 3
Total
Computer Memory Configurations
Adding more memory allows the computer to run larger, more complicated software and to run it faster.
LPx and LPx+ Memory Configurations
The computer comes with at least 4 MB of memory. This amount can be increased up to 64 MB (128MB
for the LPx+ computer), however, when adding additional memory make sure to:
♦ Install 36-bit SIMMs having an access time of 70 ns or less.
♦ Only those configurations listed below are allowed.
♦ Supported SIMM sizes: 4 MB, 8 MB, 16 MB, 32 MB and 64 MB.
♦ Fill banks 0 and 1(marked A on the illustration) before banks 2 and 3 (marked B on the illustration).
4 MB
4 MB 4 MB
8 MB
4 MB 4 MB 4 MB
4 MB 4 MB 4 MB 4 MB
8 MB 8 MB
16 MB
4 MB 16 MB
4 MB 4 MB 16 MB
8 MB 8 MB 8 MB
16 MB 16 MB
8 MB 8 MB 8 MB 8 MB
4 MB 16 MB 16 MB
4 MB 32 MB
4 MB 4 MB 16 MB 16 MB
4 MB 4 MB 32 MB
16 MB 16 MB 16 MB
16 MB 32 MB
16 MB 16 MB 16 MB 16 MB
64 MB
16 MB 16 MB 32 MB
32 MB 32 MB
4 MB (standard)
8 MB
8 MB
12 MB
16 MB
16 MB
16 MB
20 MB
24 MB
24 MB
32 MB
32 MB
36 MB
36 MB
40 MB
40 MB
48 MB
48 MB
64 MB
64 MB
64 MB
64 MB
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Digital DECpc LPx/LPx+ Service Procedures
LPx and LPx+ SIMM Socket Locations
Figure 3 - 11 LPx and LPx+ SIMM Socket Locations
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Service Procedures Digital DECpc LPx/LPx+
Bank 0
Bank 1
Bank 2
Bank 3
Total
LPx 560/566 Memory Configurations
The computer comes with at least 8 MB of memory. This amount can be increased up to 128 MB, however,
when adding additional memory make sure to:
♦ Install 36-bit SIMMs having an access time of 70 ns or less.
♦ Fill two sockets at a time using the same SIMM size, type and speed.
Supported SIMM sizes: 4 MB, 8 MB, 16 MB, and 32 MB.
♦ Fill banks 0 and 1(marked A on the illustration) before banks 2 and 3 (marked B on the illustration).
4 MB 4 MB
4 MB 4 MB 4 MB 4 MB
8 MB 8 MB
4 MB 4 MB 8 MB 8 MB
8 MB 8 MB 8 MB 8 MB
16 MB 16 MB
4 MB 4 MB 16 MB 16 MB
8 MB 8 MB 16 MB 16 MB
16 MB 16 MB 16 MB 16 MB
32 MB 32 MB
4 MB 4 MB 32 MB 32 MB
8 MB 8 MB 32 MB 32 MB
16 MB 16 MB 32 MB 32 MB
32 MB 32 MB 32 MB 32 MB
8 MB (standard)
16 MB
16 MB
24 MB
32 MB
32 MB
40 MB
48 MB
64 MB
64 MB
72 MB
80 MB
96 MB
128 MB
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Digital DECpc LPx/LPx+ Service Procedures
LPx 560/566 SIMM Socket Locations
Figure 3 - 12 LPx 560/566 SIMM Socket Locations
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Service Procedures Digital DECpc LPx/LPx+
Removal Procedures
Removing the 3½-Inch Diskette Drive
To remove the 3½-inch diskette drive:
1) Turn off the computer.
2) Disconnect external devices, ac power, and monitor power.
3) Unlock and remove outside cover.
4) Disconnect power and ribbon cables.
5) Loosen screw securing drive's mounting tray to chassis.
6) Carefully slide mounting tray towards rear of computer until its locking tabs at bottom clear
corresponding chassis slots. Remove diskette drive and mounting tray.
Figure 3 - 13
Removing the 3½Inch Diskette
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Digital DECpc LPx/LPx+ Service Procedures
The 3½-inch diskette drive and fan pipe must be removed prior to removing any
5¼-inch device.
Removing a 5¼-Inch Device
To remove a 5¼-Inch Device:
NOTE
1) Turn off the computer.
2) Disconnect external devices, ac power, and monitor power.
3) Unlock and remove outside cover.
4) Remove 3½-inch diskette drive and fan pipe.
5) Remove retaining screws from each side of selected drive bay.
6) Slide 5¼-inch device forward out of drive bay.
Figure 3 - 14 Removing a 5¼-Inch Device
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Service Procedures Digital DECpc LPx/LPx+
Removing a 3½-Inch Mass Storage Device (Internal Drive Bay)
To remove a 3½-Inch Mass Storage Device from the internal drive bay:
1) Turn off the computer.
2) Disconnect external devices, ac power, and monitor power.
3) Unlock and remove outside cover.
4) Disconnect power and ribbon cables.
5) Remove four mounting screws.
6) Pull drive from internal drive bay.
Figure 3 - 15 Removing a 3½-Inch Mass Storage Device from the Internal Drive Bay
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Digital DECpc LPx/LPx+ Service Procedures
Removing the Fan Pipe
To remove the Fan Pipe:
1) Turn off the computer.
2) Disconnect external devices, ac power, and monitor power.
3) Unlock and remove outside cover.
4) Remove the 3½-Inch diskette drive.
5) Remove CPU module retaining bracket.
6) Unhook plastic fan pipe from card guide.
Figure 3 - 16 Removing the Fan Pipe
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Service Procedures Digital DECpc LPx/LPx+
Removing the Fan /Speaker Assembly
To remove the Fan /Speaker Assembly:
1) Turn off the computer.
2) Disconnect external devices, ac power, and monitor power.
3) Unlock and remove outside cover.
4) Remove fan and speaker connections from main logic board.
5) Press down on the two retaining clips.
6) Tilt assembly away from front panel and lift out.
Figure 3 - 17 Removing the Fan /Speaker Assembly
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Digital DECpc LPx/LPx+ Service Procedures
Removing the Main Logic Board
To remove the main logic board:
1) Turn off the computer.
2) Disconnect external devices, ac power, and monitor power.
3) Unlock and remove outside cover.
4) Remove all connectors.
5) Remove CPU module retaining bracket and CPU module.
6) Remove all expansion boards.
7) Remove fan/speaker assembly.
8) Remove lower drives.
9) Loosen screws and slide off standoffs.
LPx Main Logic Board Connections
Figure 3 - 18 LPx Main Logic Board Connections
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Service Procedures Digital DECpc LPx/LPx+
LPx+ Main Logic Board Connections
Figure 3 - 19 LPx+ Main Logic Board Connections
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Digital DECpc LPx/LPx+ Service Procedures
LPx 560/566 Main Logic Board Connections
Figure 3 - 20 LPx 560/566 Main Logic Board Connections
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Service Procedures Digital DECpc LPx/LPx+
Removing the CPU Module (LPx 560/566)
CAUTION
Before installing a new CPU module, update the computer’s BIOS. Do not wait to
update the BIOS until after installing a new CPU module.
To remove the CPU module:
1) Turn off the computer.
2) Disconnect external devices, ac power, and monitor power.
3) Unlock and remove outside cover.
4) Remove CPU module retaining bracket.
5) Carefully remove CPU module from main logic board.
Figure 3 - 21
Removing a CPU
Module (LPx
560/566)
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Digital DECpc LPx/LPx+ Service Procedures
Removing the LPx(+) Power Supply
To remove the power supply:
1) Turn off the computer.
2) Disconnect external devices, ac power, and monitor power.
3) Unlock and remove outside cover.
4) Remove screw securing power on/off cable from chassis.
5) Pull off Power On/Off button from switch at front panel.
6) Remove two screws securing power supply to chassis.
7) Remove four screws securing power supply to rear panel.
8) Remove power supply from computer.
Figure 3 - 22 Removing the LPx(+) Power Supply
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Service Procedures Digital DECpc LPx/LPx+
Removing the Filler Panel
To remove the Filler Panel:
1) Turn off the computer.
2) Disconnect external devices, ac power, and monitor power.
3) Unlock and remove outside cover.
4) Carefully place screwdriver through hole provided at side of front access drive bay and release plastic
locking tabs securing filler panel to front bezel.
5) Remove and save filler panel.
Figure 3 - 23 Removing the LPx(+) Filler Panel
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Digital DECpc LPx/LPx+ Service Procedures
Cache Upgrade
Main Logic Board Cache Sockets
Main Logic Board Cache Tag Sockets
Cache Upgrade
Main Logic Board Cache Sockets
Main Logic Board Cache Tag Sockets
Installation Procedures
Installing External Cache Memory
The computer's main logic board supports up to 256 KB of direct-mapped write back secondary cache
memory. Secondary cache memory is designed to improve the performance of the CPU and is installed in
designated DIP sockets on the main logic board.
For the DECpc LPx, secondary cache memory consists of four or eight 32 KB x 8 cache SRAM chips and
three 16 KB x 4 cache tag SRAM chips.
For the DECpc LPx+, secondary cache memory consists of four or eight 32 KB x 8 cache SRAM chips and
two 32 KB x 8 cache tag SRAM chips.
LPx Cache chip locations
0 to 128 KB
0 to 256 KB
128 to 256 KB
LPx+ Cache chip locations
0 to 128 KB
0 to 256 KB
To install a cache SRAM chip:
1) Turn off the computer.
2) Disconnect external devices, ac power, and monitor power.
3) Unlock and remove outside cover.
4) Locate appropriate DIP sockets on main logic board.
5) Remove secondary cache memory chips from antistatic packaging, handling each chip only by edges.
6) Position each chip with notched end facing rear of computer. Insert each chip into appropriate DIP
socket.
7) Set all appropriate cache jumpers.
8) Replace and lock outside cover.
9) Connect external devices and restore power.
E39 through E42 E63 through E65
E39 through E42
E52 through E55
E52 through E55
E9 through E12 E6 through E7
E9 through E16 E6 through E7
CAUTION
Installing external cache memory incorrectly might cause the computer to malfunction.
E63 through E65
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Service Procedures Digital DECpc LPx/LPx+
Figure 3 - 24 Installing External Cache Memory
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Digital DECpc LPx/LPx+ Service Procedures
Installing a Higher Performance CPU (LPx/LPX+)
CAUTION
Before installing a new CPU chip, update the computer BIOS. Do not wait to update
the BIOS until after installing a new CPU chip.
When installing an i486 microprocessor, make sure to align the chip with the outside
row of pins visible.
To install a higher performance CPU:
1) Turn off the computer.
2) Disconnect external devices, ac power, and monitor power.
3) Unlock and remove outside cover.
4) Lift up on the lever to release the CPU.
5) Remove the CPU, noting its pin 1 location.
6) Install new CPU.
7) Return release lever to its original position and then set all appropriate CPU jumpers.
8) Run BIOS Setup utility. Record new CPU's type, if necessary.
Figure 3 - 25 Installing a
Higher Performance CPU
(LPx/LPx+)
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Service Procedures Digital DECpc LPx/LPx+
Earlier versions of the CPU module did not have a voltage regulator card (66 MHz
version) as shown or jumper card (60 MHz version).
Installing a Higher Performance CPU (LPx 560/566)
CAUTION
Before installing a new CPU chip, update the computer BIOS. Do not wait to update
the BIOS until after installing a new CPU chip.
NOTE
To install a higher performance CPU:
1) Remove the CPU module.
2) Lift up on the lever to release the CPU.
3) Remove the CPU, noting its pin 1 location.
4) Install new CPU.
5) Return release lever to its original position and then set all appropriate CPU jumpers.
6) Run BIOS Setup utility. Record new CPU's type, if necessary.
Figure 3 - 26
Installing a Higher
Performance CPU
(LPx 560/566)
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Digital DECpc LPx/LPx+ Service Procedures
Replacement Procedures
Replacing the Computer Battery/Real Time Clock (RTC) (LPx)
WARNING
Make sure pin 1 on battery is correctly aligned with location on socket (see figure).
Incorrect installation can cause faulty computer operation.
To replace the computer battery/real time clock:
1) Record computer configuration settings.
2) Turn off the computer.
3) Disconnect external devices, ac power, and monitor power.
4) Unlock and remove outside cover.
5) Remove battery.
6) Install new battery.
7) Replace and lock outside cover.
8) Connect external devices and restore power.
9) Run BIOS Setup utility to reconfigure computer using recorded configuration settings from step 1.
Figure 3 - 27 Replacing
the Computer Battery
/Real Time Clock (LPx)
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Service Procedures Digital DECpc LPx/LPx+
Replacing the Computer Battery (LPx+)
To replace the computer battery:
1) Record computer configuration settings.
2) Turn off the computer.
3) Disconnect external devices, ac power, and monitor power.
4) Unlock and remove outside cover.
5) Remove battery.
6) Install new battery (Toshiba CR2032 or equivalent).
7) Replace and lock outside cover.
8) Connect external devices and restore power.
9) Run BIOS Setup utility to reconfigure computer using recorded configuration settings from step 1.
Figure 3 - 28 Replacing
the Computer Battery
(LPx+)
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Digital DECpc LPx/LPx+ Service Procedures
Replacing the Computer Battery/Real Time Clock (RTC) (LPx
560/566)
WARNING
Make sure pin 1 on battery is correctly aligned with location on socket (see figure).
Incorrect installation can cause faulty computer operation.
To replace the computer battery/real time clock:
1) Record computer configuration settings.
2) Turn off the computer.
3) Disconnect external devices, ac power, and monitor power.
4) Unlock and remove outside cover.
5) Remove battery.
6) Install new battery.
7) Replace and lock outside cover.
8) Connect external devices and restore power.
9) Run BIOS Setup utility to reconfigure computer using recorded configuration settings from step 1.
Figure 3 - 29 Replacing
the Computer Battery
/Real Time Clock (LPx
560/566)
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Service Procedures Digital DECpc LPx/LPx+
Make sure the cable is connected with correct orientation. Most cables and sockets
are keyed so they cannot be connected backwards. If the cable or device is not
keyed, connect pin 1 of cable to pin 1 of device's socket.
Pin 1 of the cable is on the edge with colored stripe. Pin 1 of the device's socket
should be marked with a number or symbol at one end of the socket or with a number
or symbol printed on the circuit board near one end of the socket. If necessary, refer
to the device's documentation for pin 1 orientation.
Connecting Diskette and IDE Devices
To connect diskette and IDE devices, perform the following:
1) Connect supplied ribbon cable to appropriate device as shown.
2) Connect appropriate power cable to device.
3) Replace and lock outside cover.
4) Connect external devices and restore power.
NOTE
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Digital DECpc LPx/LPx+ Service Procedures
Legend
Diskette Drive Component
Diskette/IDE Connections
A
B
C
D
E
F
G
Power supply
Power connections
Diskette drive connection
IDE drive connection
Diskette drive
Hard disk drive
Optional storage devices
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Figure 3 - 30 Diskette/IDE Connections
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Service Procedures Digital DECpc LPx/LPx+
Legend
Diskette Drive Component
Connecting SCSI Devices
To connect SCSI devices, perform the following:
1) Connect supplied ribbon cable to appropriate device as shown:
2) Connect appropriate power cable to device.
3) Replace and lock outside cover.
4) Connect external devices and restore power.
5) Run BIOS Setup utility to configure computer.
SCSI Connections
A
B
C
D
E
F
Power supply
Power connections
SCSI cable
SCSI controller connector
SCSI hard disk drive
CD-ROM drive (or other SCSI device)
Figure 3 - 31 SCSI
Connections
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Digital DECpc LPx/LPx+ Troubleshooting
If you need to return a failed component, pack it in its original container and return it to
Digital for service.
Chapter 4 Troubleshooting
The following pages provide initial troubleshooting procedures and tables listing specific problems,
probable causes, and recommended actions to take if the computer fails after configuration or after
installation of optional hardware or software.
Refer to the documentation supplied with additional options when experiencing problems with specific
options that have been installed.
Initial Troubleshooting
Follow these general procedures to troubleshoot the DECpc LPx/LPx+ computer:
♦ Press [Ctrl] + [Alt] + [Del]. If the computer fails to boot, turn it off, wait until all hard disk drives spin
down completely, and then turn it back on.
♦ Ensure that all cables and connections are secure.
♦ If the POST detects an error refer to “Troubleshooting” and take the appropriate steps to correct the
problem. After the problem has been resolved, restart the computer.
♦ Run the diagnostic software.
♦ Run the BIOS Setup utility.
NOTE
Fill in the appropriate fields of the Part Exchange Form with the relevant error information!!
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Troubleshooting Digital DECpc LPx/LPx+
Beep Code
Error Message
Beep Codes
If the POST finds an error and cannot display a message, the computer's speaker emits a series of beeps to
indicate the error and places a value in I/O port 80h.
For example, a failure of bit 3 in the first 64 KB of RAM is indicated by a 2-1-4 beep code (a burst of two
beeps, a single beep, and a burst of four beeps).
The table below lists the beep codes and the values the POST writes to I/O port 80h when it encounters a
fatal error. This table lists fatal errors that lock up the computer. Nonfatal errors that do not lock up the
computer are listed in a separate table.
Beep Codes for Fatal Errors
1-1-3
1-1-4
1-2-1
1-2-2
1-2-3
1-3-1
1-3-3
1-3-4
1-4-1
1-4-2
2-1-1
2-1-2
2-1-3
2-1-4
2-2-1
2-2-2
2-2-3
2-2-4
2-3-1
2-3-2
2-3-3
2-3-4
2-4-1
2-4-2
2-4-3
2-4-4
3-1-1
3-1-2
3-1-3
3-1-4
3-2-4
4-2-1
4-2-2
CMOS write/read failure
ROM checksum failure
Interval timer failure
DMA failure
DMA page register write/read failure
RAM refresh failure
1st 64 KB RAM chip or data line failure
1st 64 KB RAM odd/even logic failure
1st 64 KB RAM address line failure
1st 64 KB RAM parity failure
Bit 0 1st 64 KB RAM failure
Bit 1 1st 64 KB RAM failure
Bit 2 1st 64 KB RAM failure
Bit 3 1st 64 KB RAM failure
Bit 4 1st 64 KB RAM failure
Bit 5 1st 64 KB RAM failure
Bit 6 1st 64 KB RAM failure
Bit 7 1st 64 KB RAM failure
Bit 8 1st 64 KB RAM failure
Bit 9 1st 64 KB RAM failure
Bit A 1st 64 KB RAM failure
Bit B 1st 64 KB RAM failure
Bit C 1st 64 KB RAM failure
Bit D 1st 64 KB RAM failure
Bit E 1st 64 KB RAM failure
Bit F 1st 64 KB RAM failure
Slave DMA register failure
Master DMA register failure
Master interrupt mask register failure
Slave interrupt mask register failure
Keyboard/mouse controller failure
Timer tick interrupt failure
Shutdown failure
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Beep Code
Error Message
Beep Code
Error Message
Italics indicate variable parts of a message such as memory addresses,
hexadecimal values, and so on.
These messages can differ at each occurrence.
Beep Codes for Fatal Errors (continued)
4-2-3
4-2-4
4-3-1
4-3-3
4-3-4
4-4-1
4-4-2
4-4-3
Gate A20 failure
Unexpected interrupt in protected mode
RAM failure (above 0FFFFh)
Interval timer 2 failure
Time-of-day clock failure
Serial port failure
Parallel port failure
Math coprocessor failure
Beep Codes for Non-Fatal Errors
3-3-4
3-4-1
3-4-2
Screen memory failure
Screen initialization failure
Screen retrace failure
POST and Boot Messages
The POST displays messages to alert to errors in hardware, software, and firmware or to provide operating
information about the computer.
Each time the POST displays a message on the screen, the computer's speaker beeps twice. If an error
occurs before the monitor is initialised, specific beep codes sound to alert to a problem. The following
table lists a general grouping of system messages. In addition, each message is accompanied by text
describing the message and in most cases, a recommended solution to the problem.
NOTE
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Troubleshooting Digital DECpc LPx/LPx+
Message
Solution
POST and Boot Messages (continued)
No timer tick
Shutdown failure
Timer 2 failure
Keyboard stuck key
Keyboard controller
Keyboard clock line
Keyboard data line
Keyboard failure
Mouse failure
640 KB base memory
0 KB extended memory
Time-of-day clock stopped
Invalid configuration
information
Diskette drive failure
Hard disk controller failure
Hard disk 0 failure
xxxx0h optional ROM bad
checksum = xx
Time-of-day not set
Keyboard is locked
Enable NMI
Enable cache
Boot
Replace main logic board.
Replace main logic board.
Replace main logic board.
Check the keyboard connection.
If the connection is secure, the keyboard or keyboard controller might
have failed.
Replace keyboard.
Check the mouse connection.
If the problem persists, replace the mouse.
Replace RTC.
Run the BIOS Setup utility.
Run the BIOS Setup utility.
Check all connections.
If the problem persists, replace the diskette drive.
Run the BIOS Setup utility.
Check all connections.
If the problem persists, replace the controller.
Run the BIOS Setup utility.
Check all connections.
If the problem persists, replace the hard disk.
Correct the address conflict.
If the problem persists, replace the ROM chip.
Run BIOS Setup utility and set the time and date.
Unlock the keyboard.
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Digital DECpc LPx/LPx+ Troubleshooting
Problem
Possible Cause
Action
Computer Troubleshooting
No response
when the
computer is
turned on
Power is on, but
there is no
screen display
Computer does
not boot from
an IDE hard
disk drive
Main logic board failure.
Main logic board jumpers
incorrectly set.
Brightness and contrast controls
are not correctly set.
Monitor cable is incorrectly
installed.
Video adapter not seated in the
expansion slot correctly.
Operating system software is not
installed on the IDE hard disk
drive.
IDE hard disk drive is not
correctly formatted or the
requested partition does not
exist.
There is no software on the
requested partition.
IDE hard disk drive jumpers
incorrectly set.
IDE drive type incorrect.
Loose cables.
Onboard IDE interface disabled.
Replace main logic board.
Set all appropriate jumpers.
Adjust the brightness and contrast controls.
Check all monitor connections.
Reseat the video adapter.
Install the appropriate operating system.
Format the IDE hard disk drive or partition the
IDE hard disk drive using the supplied operating
system software.
Install software on the requested partition.
Refer to the supplied IDE hard disk drive kit
installation instructions.
Run the BIOS Setup utility to identify the correct
drive type. See drive type label on drive or consult
drive documentation.
Secure all cable connections.
Run the BIOS Setup utility and set the IDE Hard
Disk Drives option to "Enabled".
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"Boot from Hard Disk C" is
disabled via BIOS Setup utility.
Enable the "Boot from Hard Disk C" via BIOS
Setup utility.
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Troubleshooting Digital DECpc LPx/LPx+
Problem
Possible Cause
Action
Computer Troubleshooting (continued)
Computer does
not boot from
an internal
SCSI hard disk
drive
Computer does
not recognize an
internal or
external SCSI
device
No response to
mouse
commands
Operating system software is not
installed on the SCSI hard disk
drive.
Requested partition does not
exist.
SCSI hard disk drive jumpers
incorrectly set.
SCSI ID conflicts.
Terminating resistors not
removed from the SCSI hard
disk drive.
Computer not configured for
SCSI hard disk drive operation.
SCSI adapter failure.
SCSI device jumpers incorrectly
set.
SCSI ID conflicts.
Terminating resistors not
removed from the SCSI device.
SCSI cable not terminated.
SCSI adapter failure.
Mouse is password protected.
Mouse is connected to the
keyboard port.
Install the appropriate operating system.
Partition the SCSI hard disk drive and then reload
the operating software.
Refer to the supplied SCSI hard disk drive kit
installation instructions.
Refer to the supplied SCSI hard disk drive kit
installation instructions on setting SCSI IDs.
Remove terminating resistors. Refer to the
supplied kit installation instructions.
Run the BIOS Setup utility and set Hard Disk
1/Hard Disk 2 to "Not Installed" and IDE Hard
Disk Drives options to "Disabled." This disables
the onboard IDE interface.
Note: When both IDE and SCSI hard disk drives
are installed, the computer uses the IDE hard disk
drive as the boot device.
Replace the SCSI adapter.
Refer to the supplied SCSI device kit installation
instructions.
Refer to the supplied SCSI device kit installation
in
structions on setting SCSI IDs.
Remove terminating resistors. Refer to the
supplied kit installation instructions.
Terminate each end of the SCSI cable.
Replace the SCSI adapter.
Enter the keyboard and mouse password.
Power down the computer and connect the mouse
to the mouse port.
Mouse driver not installed.
78 MCS Logistics Engineering - Nijmegen
Install the appropriate mouse driver. Refer to the
supplied application software documentation.
Page 76
Digital DECpc LPx/LPx+ Troubleshooting
Problem
Possible Cause
Action
Problem
Possible Cause
Action
Computer Troubleshooting (continued)
Computer does
not boot from a
target diskette
drive
No response to
keyboard
commands
Drive ID incorrectly set.
Diskette drive not enabled.
Diskette boot option disabled.
Diskette does not contain start-up
files.
Loose cables.
Keyboard is password protected.
Keyboard is connected to the
mouse port.
Disk Drive Troubleshooting
IDE/SCSI hard
disk drive
cannot read or
write
information
Incorrect disk drive jumper
settings.
Loose or incorrectly installed
cables.
IDE drive type incorrect.
Make sure the drive ID is correctly set (refer to the
documentation supplied with the diskette drive).
Run the BIOS Setup utility to enable the diskette
drive.
Run the BIOS Setup utility and set Boot From
Diskette A to "Enabled".
Insert a diskette with the correct start-up files.
Secure all cable connections.
Enter the keyboard password.
Power down the computer and connect the
keyboard to the keyboard port.
Refer to the supplied kit installation instructions.
Make sure all cables are correctly installed.
Run the BIOS Setup utility to identify the correct
drive type.
Target diskette
drive cannot
read or write
information
MCS Logistics Engineering - Nijmegen 79
Onboard IDE interface disabled.
IDE/SCSI hard disk drive is not
correctly formatted or
partitioned.
Onboard diskette controller
disabled.
Diskette write protection is
enabled.
Run the BIOS Setup utility and set the IDE
controller option to “Enabled”.
Format and partition as required using the supplied
operating system.
Run the BIOS Setup utility and set the diskette
controller to “Enabled”.
Run the BIOS Setup utility and set the diskette
write protection to “Disabled”.
Page 77
Troubleshooting Digital DECpc LPx/LPx+
Problem
Possible Cause
Action
Monitor Troubleshooting
Monitor power
indicator is not
on
No screen
display
No monitor
display while
loading
Windows video
drivers
Distortedrolling-or
flickering
screen displayor wrong/
uneven color
Color monitor
displaying
monochrome
Monitor fails to
switch to highresolution mode
Monitor display
not centered
while loading
Windows video
drivers
Monitor is turned off.
Power indicator is defective.
Configuration error.
Monitor brightness and contrast
controls are incorrectly set.
Monitor type incorrectly set. Set the correct monitor type. Refer to appropriate
Monitor incorrectly adjusted.
Monitor signal cable incorrectly
installed.
Computer was turned on before
the monitor was turned on.
Video jumper incorrectly set.
Appropriate high-resolution
video drivers are not installed or
incorrectly installed.
Monitor type incorrectly set. Set the correct monitor type.
Turn on the monitor.
Replace the failed component.
Run the BIOS SETUP UTILITY to configure the
computer for VGA operation.
Set the jumper for VGA operation. Refer to
“Main Logic Board Jumpers”.
Adjust the monitor brightness and contrast
controls.
video driver documentation.
Adjust accordingly.
Straighten any bent connector pins and then
reconnect.
Turn off the computer, turn on the monitor, then
turn the computer back on.
Set the jumper for VGA operation.
Correctly install all appropriate high-resolution
video drivers. Refer to the documentation supplied
with the monitor and/or video drivers.
Refer to appropriate video driver documentation.
80 MCS Logistics Engineering - Nijmegen
Page 78
Digital DECpc LPx/LPx+ Troubleshooting
Component
Messages
Solution
QAPlus/FE Error Messages
CPU
Hard disk
Hard
drive/controller
Floppy diskette
Floppy drive
Battery/clock
CMOS
Serial port
Video adapter
Arithmetic Function Failed.
General Functions Failed.
Exception Interrupt in Protected
Mode.
Refresh Failure.
Logic Functions Failed.
Butterfly Cylinder Access Test
Failed.
Cylinder 0 Errors.
Random Cylinder Access Failed.
Linear Cylinder Access Failed.
Controller Diagnostic Test
Failed.
Questionable Controller Card.
Hard drives failed.
Media Mismatch.
Drive Not Ready.
Write Protected Media.
Unformatted Media.
Floppy Drives Failed. Check connections, Replace drive.
Clock Stopped.
Invalid Date.
RTC Interrupt Failed.
CMOS Clock Test Failed. Change time from Setup menu in QAPLUS.
COM port failed.
Serial Chip Error.
Serial Compare Error.
Serial Timeout Error.
Video Failed.
Error in Video Buffer.
Reset CPU.
Replace CPU.
Low-level format hard disk.
Replace disk.
Run Setup, Check connections,
Reset controller, Replace controller,
Replace disk.
Use known good diskette.
Check size and density of diskette.
Close drive door.
Remove write protection.
Format diskette.
Run Setup.
Replace battery/clock.
Check COM device.
Check connections.
Replace COM device.
Replace COM device.
Replace video adapter.
Replace video adapter.
MCS Logistics Engineering - Nijmegen 81
Page 79
Digital DECpc LPx/LPx+ Device Mapping
After the computer completes the POST, the E0000h address range is available for
EMS page frame.
Address Range
Function
Notes
Chapter 5 Device Mapping
This section provides a series of tables listing mapping and address information related to computer
memory and various main logic board devices (keyboard controller, interrupt controller, DMA controller,
etc.).
The computer's memory and address locations are allocated at the factory to operate within a standard PC
environment. However, due to the number of optional devices and/or expansion boards that are available,
sometimes memory and address locations need to be changed. For example, some network expansion
boards require a specific memory location. If that location is already allocated, a memory conflict results
and the expansion board will not operate as expected. Note that some memory, I/O and interrupt locations
can be changed using the BIOS Setup utility.
CAUTION
Before changing any memory or address location, refer to the documentation supplied
with the optional device, expansion board, or software application and make sure
adequate information is available.
Memory Map (LPx/LPx+)
NOTE
00000 to 9FFFF
A0000 to BFFFF
C0000 to C7FFF
C8000 to DFFFF
E0000 to FFFFF
100000 to 3FFFFFF
MCS Logistics Engineering - Nijmegen 83
Base memory 640 KB
Video RAM 128 KB
VGA BIOS 32 KB
BIOS extension ROM (AT bus
usage)
Computer BIOS 128 KB
Extended memory 63 MB
96 KB
Page 80
Device Mapping Digital DECpc LPx/LPx+
Range
Function
Notes
Address Range
Function
Size
Memory Map (LPx 560/566 Full Range)
0 KB to 512KB
512KB to 1024KB (1MB)
1MB to 16MB
16MB to 128MB
128MB to 4GB
main memory PC compatibility range
main memory PC compatibility range
EISA/ISA memory lower limit
main memory EISA/ISA memory upper limit
memory space gap PCI memory hole
(4MB max size)
main memory Pentium upper limit
PCI memory
Memory Map (LPx 560/566 PC Compatibility Range)
0000 to 7FFFF
80000 to 9FFFF
A0000 to BFFFF
C0000 to C7FFF
C8000 to DFFFF
E0000 to EBFFF
EC000 to EFFFF
F0000 to FFFFF
Main memory 512 KB
Main/PCI/ISA memory 128 KB
PCI/ISA video buffer memory 128 KB
Video memory BIOS 32 KB
PCI/ISA card BIOS and buffer
memory
ISA/PCI adapter RAM after
POSTUsed by BIOS Setup during
POST
SCSI BIOS (if enabled) 16 KB
Planar BIOS memory 64 KB
96 KB
64 KB
(48 KB if SCSI BIOS enabled)
84 MCS Logistics Engineering - Nijmegen
Page 81
Digital DECpc LPx/LPx+ Device Mapping
Range (hexadecimal)
Function
Range (hexadecimal)
Function
I/O Address Map (LPx/LPx+)
000 - 00F
020 - 021
022
023
040 - 043
060 - 06F
070 - 07F
080 - 08F
0A0 - 0A1
0C0 - 0CF
0F0
0F1
0F8 - 0FF
1F0 - 1F7
278 - 27A
2E8 - 2EF
2F8 - 2FF
378 - 37A
3BC - 3BE
3E8 - 3EF
3B0 - 3DF
3F0 - 3F7
3F6 - 3F7
3F8 - 3FF
DMA controller one
Interrupt controller one
Index register (85C461)
Data register (85C461)
Interval timer
Keyboard controller
Real-time clock (RTC), NMI
DMA page register
Interrupt controller two
DMA controller two
Clear math coprocessor busy
Reset math coprocessor
Math coprocessor
IDE controller
LPT2
COM4
COM2
LPT1
LPT3
COM3
VGA registers
Diskette controller
IDE controller (alt status, device address)
COM1
CPU I/O Address Map (LPx 560/566)
0000 to 0CF7
0CF8
0CF9
0CFA to BFFF
C000 to CFFF
D000 to FFFF
MCS Logistics Engineering - Nijmegen 85
PCI I/O space
Configuration space enable register
Turbo and reset control register
PCI I/O space
PCI configuration space
PCI I/O space
Page 82
Device Mapping Digital DECpc LPx/LPx+
Range (hexadecimal)
Function
Range (hexadecimal)
Function
Priority
Interrupt Controller
Interrupt Number
Interrupt Source
I/O Address Map (LPx 560/566)
060 to 064
0F0 to 0FF
1F0 to 1F7
278 to 27F
2F8 to 2FF
378 to 37F
3BC to 3BE
3F0 to 3F7
3F8 to 3FF
Keyboard/mouse controller
Math co-processsor
IDE controller (if enabled)
LPT2 (if enabled)
COM2 (if enabled)
LPT1 (if enabled)
LPT3 (if enabled)
Diskette controller (if enabled)
COM1 (if enabled)
PCI Configure Space Address Map (LPx 560/566)
C0xx
C1xx
C2xx
C6xx
C7xx
C8xx
CPU bridge
Onboard PCI SCSI (if applicable)
ISA bridge
PCI slot 1
PCI slot 2
PCI slot 3
Computer Interrupt Levels (LPx/LPx+)
1 1 IRQ0
2 1 IRQ1
1 IRQ2
3 2 IRQ8
4 2 IRQ9
5 2 IRQ10
6 2 IRQ11
7 2 IRQ12
8 2 IRQ13
9 2 IRQ14
10 2 IRQ15
11 1 IRQ3
12 1 IRQ4
13 1 IRQ5
14 1 IRQ6
15 1 IRQ7
Timer tick
Keyboard controller
Cascade interrupt
Real-time clock (RTC)
Reserved
Reserved
Reserved
Mouse interrupt
Math coprocessor
Hard disk drive
Reserved
COM2, COM4
COM1, COM3
Reserved
Diskette drive
LPT1, LPT2, LPT3
86 MCS Logistics Engineering - Nijmegen
Page 83
Digital DECpc LPx/LPx+ Device Mapping
Interrupt Number
Interrupt Source
Channel
Controller
Function
Computer Interrupt Levels (LPx 560/566)
IRQ1
IRQ3
IRQ4
IRQ6
IRQ7
IRQ12
IRQ13
IRQ14
Keyboard controller
COM2 (if enabled)
COM1 (if enabled)
Diskette drive (if enabled)
LPT1, LPT2, LPT3 (if enabled)
Mouse interrupt
Math co-processor
Hard disk drive (if enabled)
DMA Channel Assignment (all models)
0 1
1 1
2 1
3 1
4 2
5 2
6 2
7 2
Refresh
Not used
Diskette controller
Not used, (ECP, standard on LPx+)
Cascade DMA
Not used
Not used
Not used
MCS Logistics Engineering - Nijmegen 87
Page 84
Digital DECpc LPx/LPx+ Pass / Fail Criteria
Chapter 6 Pass / Fail Criteria
As Final Acceptance Test the following tests should be run to meet the Pass/Fail criteria:
1) Successful completion of the POST tests.
2) Successful completion of the following QAPLUS/fe module tests (one pass):
♦ System Board (all tests)
♦ Memory (all tests)
♦ Video (all tests)
♦ ♦ Hard Disk (all tests, except: Sequential write/read (destructive test !!) and
♦ Sequential write/random read (destructive test !!))
♦ Floppy Disk (all tests)
♦ Keyboard (all tests)
♦ COM Ports (all tests)
♦ LPT Ports (all tests)
♦ Pointer Device (all tests)
3) Successful bootstrap of the on the computer installed Operating System.
Operating Systems Supported:
◊ MS-DOS version 5.0 and later
◊ OS/2 version 2.0 and later
◊ SCO Open Desktop Release 3
◊ Windows NT (DECpc LPx+ with 12 MB client/ 16 MB server memory minimum
recommended)
◊ SCO UNIX System V release 2.0 and later
Remove any software that was put on the hard drive to enable repair of the system before shipping.
When completed carefully clean the outside of the unit with cleaning solution.
MCS Logistics Engineering - Nijmegen 89
Page 85
Digital DECpc LPx/LPx+ Service Notes
Appendix A Service Notes
This appendix contains the service notes for the DECpc LPx/LPx+ series computer.
MCS Logistics Engineering - Nijmegen 91
Page 86
Digital DECpc LPx/LPx+ Useful Information
Description
Order’s
Appendix B Useful Information
Related Documentation
DECpc LPx/LPx+ Quick Reference Guide
SMM Spares Catalogue
DECpc LPx/LPx+ Installation Card (English)
DECpc LPx/LPx+ Installation Card (French)
DECpc LPx/LPx+ Installation Card (Italian)
DECpc LPx/LPx+ Installation Card (German)
DECpc LPx/LPx+ Installation Card (Spanish)
DECpc LPx/LPx+ Installation Card (Dutch)
DECpc LPx/LPx+ User's Guide (English)
DECpc LPx/LPx+ User's Guide (French)
DECpc LPx/LPx+ User's Guide (Italian)
DECpc LPx/LPx+ User's Guide (German)
DECpc LPx/LPx+ User's Guide (Spanish)
DECpc LPx/LPx+ User's Guide (Dutch)
805 VGA Users Guide (English)
805 VGA Users Guide (Multilingual)
864 VGA Users Guide (English)
864 VGA Users Guide (Multilingual)
928 VGA Users Guide (English)
928 VGA Users Guide (Multilingual)
EK-A0883-RG
EK-A0815-RG
ER-800WW-IA
ER-800WW-IP
ER-800WW-II
ER-800WW-IG
ER-800WW-IS
ER-800WW-IH
ER-800WW-UA
ER-800WW-UP
ER-800WW-UI
ER-800WW-UG
ER-800WW-US
ER-800WW-UH
ER-76HEA-UA
ER-76HEA-UM
ER-XAGAL-UA
ER-XAGAL-UM
ER-76HEB-UA
ER-76HEB-UM
MCS Logistics Engineering - Nijmegen 93
Page 87
Useful Information Digital DECpc LPx/LPx+
On-Line Bulletin Boards
The most current product information and technical support is also available on line. The most current
device drivers, Setup diskettes and technical tips can be found on all of these bulletin boards.
♦ DECpc Bulletin Board Server
DECpc BBS provides an easy-to-use, menu-driven bulletin board providing on-line access to the
latest PC product information, device drivers, shareware and freeware.
Network Location for ;
North America, South America, Australia and New Zealand
PCBUHD::DKB300:[WC30.BBSFILES]
Europe, Africa, Middle and Far East:
SUTRA::D6:[PUBLIC].
94 MCS Logistics Engineering - Nijmegen
Page 88
Digital DECpc LPx/LPx+ Document Feedback
Document Feedback
If you have comments on the contents or layout of this document we highly appreciate your feedback.
We will do our best to make this document a valuable support to your service efforts for Digital.
Please fill -out the reader feedback form and send or fax it to:
Digital Equipment Parts Center b.v.
Att: MCS Logistics Engineering Call Desk
P.O. Box 6774
6503 GG Nijmegen
Holland
If you have questions about this document please do not hesitate to get in contact with our Call Desk. The
number is:
Phone: xx31-24-3529666
Fax: xx31-24-3563106
MCS Logistics Engineering - Nijmegen 95
Page 89
READERS COMMENTS
DECpc LPx/LPx+ Service Maintenance Manual
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