Compaq 486, PORTABLE 486c Maintenance And Service Manual
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MAINTENANCE AND SERVICE GUIDE
COMPAQ PORTABLE 486c Personal Computer
First Edition (October 1991)
Text Number 128987-001
Chapter 1. Specifications
Introduction
This chapter provides physical, environmental, and performance specifications
for the following COMPAQ PORTABLE 486c Personal Computer subsystems:
o System Unit
o Full Function 101/102 Key Keyboard
o Active Matrix Color VGA Display
o Power Supply
o 3 1/2 inch 1.44 Megabyte Diskette Drive
o 210 and 120 Megabyte Fixed Disk Drives
Chapter 1.1 System Unit
=============================================================================
----------------------------------------------------------------------------Dimensions
Height 11.0 inch 27.9 cm
Width 15.6 inch 39.6 cm
Depth 5.5 inch 13.9 cm
----------------------------------------------------------------------------Weight (with keyboard)
Model 210 17.6 lb 7.9 kg
Model 120 17.6 lb 7.9 kg
----------------------------------------------------------------------------Environmental Requirements
U.S. Other
Temperature
Operating 50oF to 104oF 10oC to 40oC
Nonoperating -22oF to 140oF -30oC to 60oC
Relative Humidity (noncondensing)
Operating 20% to 80% 20% to 80%
Nonoperating 5% to 90% 5% to 90%
Maximum Unpressurized
Altitude
Operating 10,000 ft 3,050 m
Nonoperating 30,000 ft 9,150 m
----------------------------------------------------------------------------Cooling 12 VDC fan 12 VDC fan
----------------------------------------------------------------------------Shock 40g, 11 ms, half sine
(nonoperating)
----------------------------------------------------------------------------Vibration
Operating 0.25g, 5 to 500 Hz,
1/2 octave/min sweep
Nonoperating 1.0g, 5 to 500 Hz,
1/2 octave/min sweep
=============================================================================
Chapter 1.2 Keyboard
=============================================================================
----------------------------------------------------------------------------Dimensions
Height 1.2 inch 3.0 cm
Depth 7.4 inch 18.7 cm
Width 15.7 inch 39.8 cm
----------------------------------------------------------------------------Weight 2.65 lb 1.2 kg
----------------------------------------------------------------------------Number of Keys 101 102
----------------------------------------------------------------------------Cable
Compressed 24.0 inch 60.9 cm
Extended 46.5 inch 118.1 cm
----------------------------------------------------------------------------Interface 6 pin mini DIN 6 pin mini DIN
----------------------------------------------------------------------------Power
Volts 4.5 to 5.5 VDC 4.5 to 5.5 VDC
Current 300 mA 300 mA
=============================================================================
English Other
connector connector
Chapter 1.3 Active Matrix Color Display
=============================================================================
----------------------------------------------------------------------------Dimensions (viewing area)
Height 6.2 inch 15.8 cm
U.S. Other
Width 8.3 inch 21.1 cm
----------------------------------------------------------------------------Diagonal Size 10.4 inch 26.4 cm
----------------------------------------------------------------------------Mounting Internal Internal
----------------------------------------------------------------------------Tilt Angle -5oF to 32oF -5oC to 32oC
----------------------------------------------------------------------------Display Active Matrix Active Matrix
Color VGA, TFT Color VGA, TFT
----------------------------------------------------------------------------Color Capability 256, 16 shades 256, 16 shades
per primary color per primary color
----------------------------------------------------------------------------Brightness Adjustable Adjustable
----------------------------------------------------------------------------Maximum Pixel Resolution
(Text and Graphics) 640 x 480 640 x 480
640 x 400 640 x 400
640 x 350 640 x 350
----------------------------------------------------------------------------Operating Frequency 25 MHz 25 MHz
----------------------------------------------------------------------------VDC Input
Nominal Voltage 5 VDC 12 VDC
Current Maximum 150 mA 420 mA
Power Maximum 0.75W 5.04W
==============================================================================
Chapter 1.4 Power Supply
=============================================================================
----------------------------------------------------------------------------Input Requirements
Nominal Voltage 120 VAC 240 VAC
Maximum Range Voltage 100 to 120 VAC 220 to 240 VAC
Line Frequency 60 Hz 50 Hz
Current 4A 2A
Fuse 5A 5A
----------------------------------------------------------------------------Operating Power 125W * 125W *
----------------------------------------------------------------------------Line Voltage Switching Automatic Automatic
----------------------------------------------------------------------------Cooling 2 speed fan, 2 speed fan,
----------------------------------------------------------------------------Operating Temperature 41oF to 104oF 5oC to 40oC
----------------------------------------------------------------------------VDC Output
Nominal Voltage 5V 12V -12V
Current Minimum 1.5A 0.1A 0A
Current Maximum 12A 4.2A 1A
Maximum Peak Current 18A 6A 1A
Regulation Tolerance 3% 5% 5%
-----------------------------------------------------------------------------
U.S. Other
thermostatically thermostatically
controlled controlled
NOTE: These values are maximum values based on nominal operating conditions
for temperature, line voltage, frequency, and altitude.
----------------------------------------------------------------------------* 60W maximum available through EISA expansion slots.
=============================================================================
Chapter 1.5 Diskette Drive
=============================================================================
-----------------------------------------------------------------------------
Diskette Size 3 1/2 inch
Capacity Per Diskette
(high/low) 1.44 MB/720 KB
LED Indicators
Read/Write (high density) Green
Read/Write (low density) Orange
Drives Supported One
Drive Height 0.75 inch (1.9 cm)
Drive Rotation (rpm) 300
Transfer Rate (bps)
(high/low) 500K/250K
Bytes Per Sector 512
Sectors Per Track
(high/low) 18/9
1.44 MB
Tracks Per Side
(high/low) 80/80
Access Times
Track to Track 3 ms
Average 80 ms
Settling Time 15 ms
Latency Average 100 ms
Cylinders (high/low) 80/80
Read/Write Heads 2
=============================================================================
Chapter 1.6 Fixed Disk Drives
=============================================================================
-----------------------------------------------------------------------------
Standard Configurations Model 210 Model 120
Formatted Capacity 212.6 MB 121.5 MB
210 MB 120 MB
Drives Supported One One
Form Factor 3 1/2 inch 3 1/2 inch
Drive Height 1 inch 1 inch
Drive Weight 1.3 lb 1.3 lb
Drive Type (logical) 51 50
Drive Speed 4500 rpm 3399 rpm
Transfer Rate (per second)
Head 20 MB 12 MB
Buffer (max) 5 MB 4.5 MB
Sector Interleave 1:1 1:1
Seek Times
Track to Track 3 ms 8 ms
Average 12 ms 19 ms
Maximum 30 ms 35 ms
Cylinders
Physical 2119 1522
Logical 683 760
Read/Write Heads
Physical 4 4
Logical 16 8
Sectors Per Track
Physical 49 40
Logical 38 + 1 spare 39 + 1 spare
Bytes Per Sector 512 512
=============================================================================
Chapter 2. Power On Self Test (POST)
Introduction
This chapter lists the subassemblies checked by the Power On Self Test (POST)
and briefly describes the types of error codes that can occur. The chapter
also includes problem isolation procedures and a flowchart for quick
reference.
Chapter 2.1 POST
POST is a series of diagnostic tests that runs automatically on the COMPAQ
PORTABLE 486c Personal Computer when it is turned on.
POST checks the following subassemblies to ensure that the computer system is
functioning properly:
o Processor Board
o Memory Module
o Keyboard
o Controller Circuitry
o Video Circuitry
o Fixed Disk Drive
o Diskette Drive
If POST finds an error in the computer, an error condition is indicated by an
audible and/or visual message. See Chapter 3, "Error Messages and Codes,"
for an explanation of the error codes and a recommended course of action.
Chapter 2.2 Preliminary Steps
If you encounter an error condition, complete the following steps before
starting the problem isolation procedures:
1. Turn off power to the computer.
2. Disconnect any external devices. Do not disconnect the printer if you
want to test the printer or use it to log error messages.
3. Install all appropriate loopback plugs and terminating plugs for complete
testing.
4. Clear the power on password, if it is preset by the user. You will know
that the power on password is set when a key icon (0--m) appears on the
screen when POST completes. If this occurs, you must enter the password
to continue.
If you do not have access to the password, you must disable the power on
password feature by setting the power on password switch (see section
2.3, "Clearing Power on Password").
5. Access the fixed disk drive.
You will know that the fixed disk drive password is set when the
DriveLock icon (see illustration of DriveLock icon below) appears on the
screen. If this occurs, you must enter the fixed disk drive password to
continue.
IMPORTANT: It is not necessary to access the fixed disk drive in order to run
the Diagnostics diskette; however, complete system testing cannot be done
without access to the complete system.
The user must clear the fixed disk drive password or give you access
before servicing can be performed.
6. Position the brightness and volume controls approximately in the center
of their range.
7. Insert the Diagnostics diskette into drive A.
8. Turn on the computer.
9. Follow the procedures of the Problem Isolation Flowchart, section 2.4.
Refer to Chapter 3, "Error Messages and Codes," for detailed information
on problem isolation.
Chapter 2.3 Clearing Power On Password
To clear the power on password feature, reset the power on password switch
(SW5) located on the I/O board. To do so, complete the following steps:
1. Disconnect the AC power.
2. Disassemble the computer to reach the I/O board (refer to Chapter 5).
3. Locate the power on password switch (SW5) on the I/O board; set the
switch to ON (Figure 2-1).
4. Reconnect AC power.
5. Turn on the computer and allow it to complete POST.
6. Turn the computer off.
7. Set switch SW5 to OFF.
8. Disconnect AC power.
9. Reassemble the computer (refer to Chapter 5).
10. Reconnect the AC power.
11. Turn on the computer and allow it to complete POST. If the key icon
(o--m) does not appear when POST completes, the power on password has
been cleared.
Chapter 2.4 Problem Isolation Flowchart
The problem isolation flowchart provides a quick reference for identifying
and correcting problems that may occur during POST. The flowchart gives
troubleshooting procedures for identifying malfunctions. It also directs you
to the Diagnostics chapter in the SUPPORT SOFTWARE MAINTENANCE AND SERVICE
GUIDE and to Chapter 3, "Error Messages and Codes," for more detailed
troubleshooting information.
Chapter 3. Error Messages and Codes
This chapter contains Power On Self Test (POST) messages, Diagnostic error
codes, and memory error codes for the COMPAQ PORTABLE 486c Personal Computer.
The messages and codes appear in tables that list the message or error code,
a description of the error or its probable cause, and the action recommended
to resolve the error condition.
Chapter 3.1 Power On Self Test Messages
An error message results if a problem is encountered during POST, which runs
automatically when the system is turned on.
Table 3-1 lists the messages for POST, the audible (beep) messages, probable
causes, and recommended actions.
Table 3-1. Power On Self Test Messages
=============================================================================
Message Beeps Probable Cause Recommended Action
-----------------------------------------------------------------------------
101 - ROM Error 1 Long, System ROM The following steps
1 Short checksum apply to error
101 - I/O ROM Error 1 Long, Option ROM 1. Inspect the ROM
1 Short checksum placement.
-----------------------------------------------------------------------------
102 - Processor None Processor board: Replace the processor
Board Failure DMA timers, etc. board.
-----------------------------------------------------------------------------
162 - System Options 2 Short Configuration Run COMPAQ EISA
Not Set incorrect or no Configuration utility.
-----------------------------------------------------------------------------
163 - Time and 2 Short Invalid time or Run COMPAQ EISA
Date Not Set date in Configuration utility.
-----------------------------------------------------------------------------
164 - Memory Size 2 Short Configuration Run COMPAQ EISA
Error memory size Configuration utility.
-----------------------------------------------------------------------------
170 - Expansion 1 Short EISA board not Run COMPAQ EISA
Device ready after Configuration utility
-----------------------------------------------------------------------------
172 - EISA 1 Short Nonvolatile Run COMPAQ EISA
Configuration configuration Configuration utility
Nonvolatile memory corrupt or for error codes 172-xx
Memory jumper installed through 177-xx.
code 101:
2. Verify the correct
ROM.
3. Replace the ROM.
diskette drive
configuration
memory
incorrect
power on delay
173 - EISA Slot ID 1 Short Board replaced,
Mismatch configuration not
updated
174 - EISA 1 Short EISA board
Configuration/ not found
Slot Mismatch
175 - EISA 1 Short EISA board added,
Configuration/ configuration not
Slot Mismatch updated
176 - Slot with 1 Short EISA board in
Unreadable ID slot that should
contain ISA board
177 - Configuration 1 Short Incomplete EISA
Not Complete configuration
----------------------------------------------------------------------------Message Beeps Probable Cause Recommended Action
----------------------------------------------------------------------------178 - Processor 1 Short System board type Run COMPAQ EISA
Configuration invalid or step Configuration utility.
does not match
configuration memory
----------------------------------------------------------------------------XX000Y ZZ * None RAM failure 1. Replace the
201 - Memory Error memory module
(see Figure 3-1).
2. Replace the
processor board.
----------------------------------------------------------------------------XX000Y ZZ * None Memory failure Replace the
203 - Memory processor board.
Address Error
----------------------------------------------------------------------------205 - Memory Error None Cache Memory Run Diagnostics.
XXYYYYY controller or
ZZZZZZZZ RAM failure
----------------------------------------------------------------------------301 - Keyboard None Keyboard 1. Check that keyboard
Error failure is connected.
2. Replace the
keyboard.
----------------------------------------------------------------------------303 - Keyboard None Processor board, Replace the keyboard,
Controller Error keyboard, or mouse or I/O board.
mouse
----------------------------------------------------------------------------304 - Keyboard or None Keyboard or 1. Replace the
System Unit processor board keyboard.
Error 2. Replace the
processor board.
----------------------------------------------------------------------------501 - Display 1 Long, Video display Replace the video board
Adapter Failure 2 Short controller
----------------------------------------------------------------------------Message Beeps Probable Cause Recommended Action
----------------------------------------------------------------------------601 - Diskette None Diskette Controller 1. Replace the power
Controller Error circuitry distribution board
and retest.
2. Run Diagnostics.
3. Replace the
I/O board.
----------------------------------------------------------------------------605 - Diskette Drive 2 Short Mismatch in Run COMPAQ EISA
Type Error drive type Configuration utility.
----------------------------------------------------------------------------610 - External None External Storage Turn on External
Storage Module Module connected Storage Module or
Failure. Hit but turned off disconnect from
F1 when ready. computer.
----------------------------------------------------------------------------701 - Coprocessor None Coprocessor Replace processor
Error board.
----------------------------------------------------------------------------1151 - Comm Port 1 2 Short Added or removed Run COMPAQ EISA
Configuration modem, or second Configuration utility
Error modem board for error codes
1151 through 1154.
1152 - Comm Port 2 2 Short Added or removed
Configuration modem, or second
Error modem board
1153 - Comm Port 3 2 Short Added or removed
Configuration modem, or second
Error modem board
1154 - Comm Port 4 2 Short Added or removed
Configuration modem, or second
Error modem board
----------------------------------------------------------------------------Message Beeps Probable Cause Recommended Action
----------------------------------------------------------------------------1771 - Primary Disk 2 Short Internal and Run Diagnostics.
Port Address external fixed disk
Assignment drive controllers
Conflict are assigned to the
primary address
----------------------------------------------------------------------------1772 - Secondary 2 Short Internal and Run Diagnostics.
Disk Port Address external fixed disk
Assignment drive controllers
Conflict are assigned to the
secondary address
----------------------------------------------------------------------------1780 - Disk 0 None Fixed disk drive/ 1. Run Diagnostics.
Failure format error 2. Check and/or
replace the power
distribution board.
3. Replace the fixed
disk drive.
----------------------------------------------------------------------------1781 - Disk 1 None Fixed disk drive/ 1. Run Diagnostics.
Failure format error 2. Check and/or
replace the power
distribution board.
3. Replace the fixed
disk drive.
----------------------------------------------------------------------------1782 - Disk None Fixed disk drive 1. Run Diagnostics.
Controller controller error 2. Check and/or
Failure replace the power
distribution board.
3. Replace the fixed
disk drive.
----------------------------------------------------------------------------Message Beeps Probable Cause Recommended Action
----------------------------------------------------------------------------1790 - Disk 0 Error None Fixed disk drive 1. Run Diagnostics.
error or wrong 2. Replace the
drive type drive.
----------------------------------------------------------------------------1791 - Disk 1 Error None Fixed disk drive 1. Run Diagnostics.
error or wrong 2. Replace the
drive type drive.
----------------------------------------------------------------------------XX000Y ZZ Parity None Parity RAM Run Diagnostics.
Check 2 failure
----------------------------------------------------------------------------Audible 1 Short Power on None.
successful
----------------------------------------------------------------------------Audible 2 Short Power on None.
successful
----------------------------------------------------------------------------(RESUME = None As indicated Press F1 key
"F1" KEY) to continue.
=============================================================================
Chapter 3.2 Diagnostic Error Codes
Diagnostic error codes occur if the system recognizes a problem while running
the Diagnostics program (refer to the SUPPORT SOFTWARE MAINTENANCE AND
SERVICE GUIDE for additional information on running the Diagnostics
software). These error codes help identify possible defective subassemblies.
Tables 3-2 through 3-12 list possible error codes, a description of the error
condition, and the action required to resolve the error condition.
In each case, the Recommended Action column lists steps necessary to correct
the problem. After completing each step, run the Diagnostics program to
verify whether the error condition has been corrected. If the error code
reappears, perform the next step, then run the Diagnostics program again.
Follow this procedure until the Diagnostics program no longer detects an
error condition.
The error codes appear in an AYY XX or AAYY XX format.
A or AA = number that represents faulty assembly
YY = test or action that failed
XX = a specific problem
Example: Error code 610-21 shows that the diskette drive failed to get change
line status.
For assistance in the removal and replacement of a particular subassembly,
see Chapter 5, "Removal and Replacement Procedures."
Table 3-2. Processor Test Error Codes
=============================================================================
Error Recommended
Code Description Action
----------------------------------------------------------------------------101 - 01 16 bit CPU failed Replace the processor board
and retest for error codes
101 - 02 32 bit CPU failed 101 - xx.
101 - 50 BIOS dispatch of processor
101 - 51 Processor is unavailable
or non existent
101 - 52 Time out waiting for
completion of test
101 - 53 Failure to terminate processor
101 - 54 Time out waiting for serial
semaphore
101 - 56 Unexpected interrupt occurred
during test
101 - 91 16 bit multiplication, expected
101 - 92 32 bit multiplication expected
101 - 93 16 bit multiplication
unexpected
101 - 94 32 bit multiplication
unexpected
101 - 95 Coprocessor and processor
board conflict
101 - 96 Refer to Authorized Compaq
Dealer Service Bulletin No. 84.
----------------------------------------------------------------------------Error Recommended
Code Description Action
----------------------------------------------------------------------------102 - 01 Coprocessor initial status The following steps apply
word incorrect to error codes 102 - xx:
1. Run COMPAQ EISA
102 - 02 Coprocessor initial control Configuration utility.
word incorrect 2. Replace the processor
board and retest.
102 - 03 Coprocessor
tag word not all ones
102 - 04 Coprocessor tag
word not all zeros
102 - 05 Coprocessor exchange
command failed
102 - 06 Coprocessor masked
exception incorrectly handled
102 - 07 Coprocessor unmasked
exception incorrectly handled
102 - 08 Coprocessor wrong mask
bit set in status register
102 - 09 Coprocessor unable to
store real number
102 - 10 Coprocessor real number
calculation test failed
102 - 11 Coprocessor speed test
failed
102 - 12 Coprocessor pattern test failed
102 - 14 Switch indicates no numeric
coprocessor present
102 - 15 Coprocessor is inoperative
----------------------------------------------------------------------------Error Recommended
Code Description Action
----------------------------------------------------------------------------103 - 01 DMA page registers test Replace the processor
failed board and retest for
error codes 103 - xx
103 - 02 DMA byte controller test through 114 - xx.
failed
103 - 03 DMA word controller test
failed
104 - 01 Interrupt controller master
test failed
104 - 02 Interrupt controller slave
test failed
104 - 03 Interrupt controller software
RTC is inoperative
105 - 01 Port 61 bit 6 not at zero
105 - 02 Port 61 bit 5 not at zero
105 - 03 Port 61 bit 3 not at zero
105 - 04 Port 61 bit 1 not at zero
105 - 05 Port 61 bit 0 not at zero
105 - 06 Port 61 bit 5 not at one
105 - 07 Port 61 bit 3 not at one
105 - 08 Port 61 bit 1 not at one
----------------------------------------------------------------------------Error Recommended
Code Description Action
----------------------------------------------------------------------------105 - 09 Port 61 bit 0 not at one Replace the processor board
and retest for error codes
105 - 10 Port 61 I/O test failed 103 - xx through 114 - xx.
105 - 11 Port 61 bit 7 not at zero
105 - 12 Port 61 bit 2 not at zero
105 - 13 No interrupt generated
by failsafe timer
105 - 14 NMI not triggered by
failsafe timer
107 - 01 CMOS RAM test failed
107 - 02 NOVRAM failed
107 - 03 Unable to restore extended
non volatile memory contents
108 - 02 CMOS interrupt test failed
108 - 03 CMOS interrupt test, CMOS
not properly initialized
109 - 01 CMOS clock load data test
failed
109 - 02 CMOS clock rollover test
failed
109 - 03 CMOS clock test, CMOS not
properly initialized
----------------------------------------------------------------------------Error Recommended
Code Description Action
----------------------------------------------------------------------------110 - 01 Programmable timer load Replace the processor board
data test failed and retest for error codes
103 - xx through 114 - xx.
110 - 02 Programmable timer dynamic
test failed
110 - 03 Programmable Timer No. 2
load data test failed
111 - 01 Refresh detect test failed
112 - 01 Speed test slow mode out
of range
112 - 02 Speed test mixed mode out
of range
112 - 03 Speed test fast mode out
of range
112 - 04 Speed test unable to enter
slow mode
112 - 05 Speed test unable to enter
mixed mode
112 - 06 Speed test unable to enter
fast mode
112 - 07 Speed test system error
112 - 08 Speed test unable to enter
auto mode
----------------------------------------------------------------------------Error Recommended
Code Description Action
----------------------------------------------------------------------------112 - 09 Speed test unable to enter Replace the processor board
high mode and retest for error codes
103 - xx through 114 - xx.
112 - 10 Speed test high mode out
of range
112 - 11 Speed test auto mode out
of range
112 - 12 Speed test variable speed
mode inoperative
112 - 13 Failed Cache speed test
113 - 50 BIOS dispatch of processor
113 - 51 Processor is unavailable
or nonexistent
113 - 52 Time out waiting for
completion of test
113 - 54 Time out waiting for serial
semaphore
113 - 56 Unexpected interrupt
occurred during test
114 - 01 Speaker test failed
=============================================================================
Table 3-3. Memory Test Error Codes
=============================================================================
Error Recommended
Code Description Action
----------------------------------------------------------------------------201 - 01 Memory machine ID test The following steps apply
failed to error codes 201 - xx
through 202 - xx:
1. Replace the system ROM
201 - 02 Memory machine type and retest.
test failed 2. Replace the processor
board and retest.
201 - 03 Memory machine ID
and type test failed
202 - xx ROM checksum test failed
202 - 01 Test failed
202 - 02 Failed RAM/ROM map
test
202 - 03 Failed RAM/ROM protect
test
202 - 04 System RAM/ROM
checksum test failed
----------------------------------------------------------------------------203 - xx RAM write/read test The following steps apply
failed to error codes 203 - xx
through 211 - xx:
203 - 01 Memory write/read test 1. Replace the memory
module and retest.
203 - 02 Error during saving 2. Replace the processor
program memory in board and retest.
write/read test
203 - 03 Error during restore of
memory in write/read test
204 - xx RAM address test failed
204 - 01 Memory address test
failed
204 - 02 Error during saving
program memory in
address test
----------------------------------------------------------------------------Error Recommended
Code Description Action
----------------------------------------------------------------------------204 - 03 Error during restore of The following steps apply
program memory in to error codes 203 - xx
address test through 211 - xx:
1. Replace the memory
204 - 04 A20 address test failed module and retest.
2. Replace the processor
204 - 05 Page hit address test board and retest.
failed
205 - 01 Walking 1/0 test failed
205 - 02 Error during saving
program memory in
walking 1/0 test
205 - 03 Error during restore of
program memory in
walking 1/0 test
205 - 04 Insufficient memory
to perform test
206 - xx Increment pattern test
failed
208 - 01 Memory refresh test
failed
208 - 02 Error during saving
program memory in
refresh test
208 - 03 Error during restore
program memory in
fresh test
----------------------------------------------------------------------------Error Recommended
Code Description Action
----------------------------------------------------------------------------210 - xx Random Pattern Test The following steps apply
Failed to error codes 203 - xx
through 211 - xx:
210 - 01 Data read from block did 1. Replace the memory
not match data written module and retest.
2. Replace the processor
210 - 02 Scan of test block prior to board and retest.
testing
210 - 05 Inverted pattern compare,
RAM correct
210 - 10 Mapping LIM block, LIM
page not present
211 - xx Random Pattern Test
211 - 01 Memory random pattern
test failed
211 - 02 Error during saving program
memory and random pattern
in write/read test
211 - 03 Error during restore of
program memory and random
pattern in write/read test
211 - 04 Insufficient memory to
perform test
211 - 05 Inverted pattern compare,
but RAM correct
=============================================================================
Table 3-4. Keyboard Test Error Codes
=============================================================================
Error Recommended
Code Description Action
----------------------------------------------------------------------------301 - 01 Keyboard short test, The following steps apply
8042 self test failed to error codes 301 - xx
through 304 - xx:
301 - 02 Keyboard short test, 1. Check the keyboard
interface test failed connection. If
disconnected, turn off
301 - 03 Keyboard short test, echo the computer and
test failed connect the keyboard.
2. Replace the keyboard
301 - 04 Keyboard short test failed and retest.
3. Replace the I/O board
302 - 01 Keyboard long test failed and retest.
303 - 01 Keyboard LED test, 8042
self test failed
303 - 02 Keyboard LED test, reset
test failed
303 - 03 Keyboard LED test, reset
test failed
303 - 04 Keyboard LED test, LED
command test failed
303 - 05 Keyboard LED test, LED
command test failed
303 - 06 Keyboard LED test, LED
command test failed
303 - 07 Keyboard LED test, LED
command test failed
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