Refer to the table below for changes made on this version of the Packard Bell oneTwo M3350 / oneTwo M3351 / oneTwo L5350
/ oneTwo L5351 All-In-One Computer Service Guide.
DateChapterUpdates
iiPackard Bell oneTwo M3350 / oneTwo M3351 / oneTwo L5350 / oneTwo L5351 Service Guide
The information in this guide is subject to change without notice.
Acer Incorporated makes no representations or warranties, either expressed or implied, with respect to the
contents hereof and specifically disclaims any warranties of merchantability or fitness for any particular
purpose. Any Acer Incorporated software described in this guide is sold or licensed "as is". Should the
programs prove defective following their purchase, the buyer (and not Acer Incorporated, its distributor, or its
dealer) assumes the entire cost of all necessary servicing, repair, and any incidental or consequential
damages resulting from any defect in the software.
Acer is a registered trademark of Acer Incorporated.
Other brand and product names are trademarks and/or registered trademarks of their respective holders.
Packard Bell oneTwo M3350 / oneTwo M3351 / oneTwo L5350 / oneTwo L5351 Service Guideiii
Conventions
The following textual conventions are used in this service guide.
SCREEN MESSAGESDenotes actual messages that appear on screen.
NOTEGives additional information related to the current topic.
WARNINGAlerts you to any physical risk or system damage that might result from
doing or not doing specific action s.
CAUTIONGives precautionary measures to avoid possible hardware or software
problems.
IMPORTANTReminds you to do specific actions relevant to the accomplishment of
procedures.
ivPackard Bell oneTwo M3350 / oneTwo M3351 / oneTwo L5350 / oneTwo L5351 Service Guide
Service Guide Coverage
This Service Guide provides you with all technical information relating to the BASIC CONFIGURATION
decided for our "global" product offering. To better fit local market requirements and enhance product
competitiveness, your regional office MAY have decided to extend the functionality of a machine (e.g. add-on
card, modem, or extra memory capability). These LOCALIZED FEATURES will NOT be covered in this generic
service guide. In such cases, please contact your regional offices or the responsible personnel/channel to
provide you with further technical details.
FRU Information
Please note WHEN ORDERING FRU PARTS, that you should check the most up-to-date information available
on your regional web or channel. If, for whatever reason, a part number change is made, it will not be noted in
the printed service guide. For AUTHORIZED SERVICE PROVIDERS, your office may have a DIFFERENT
part number code to those given in the FRU list of this printed service guide. You MUST use the list provided
by your regional Acer office to order FRU parts for repair and service of customer machines.
Packard Bell oneTwo M3350 / oneTwo M3351 / oneTwo L5350 / oneTwo L5351 Service Guidev
viPackard Bell oneTwo M3350 / oneTwo M3351 / oneTwo L5350 / oneTwo L5351 Service Guide
Packard Bell oneTwo M3350 / oneTwo M3351 / oneTwo L5350 / oneTwo L5351 Service Guideviii
Chapter 1
Features and Specifications
This chapter lists the features and specifications of the Packard Bell oneTwo M3350 / oneTwo M3351 /
oneTwo L5350 / oneTwo L5351 AIO computer.
NOTE The items listed in this section are for reference only. The exact configuration of your PC depends
on the model purchased.
System Features
ComponentDescription
Processor• Socket AM3, 941 pin contacts
• Supports the AMD Phenom™ II X3 or X4 Processors
ChipsetnVIDIA GeForce 8200 (MCP78PV)
Memory• Number of DIMM slots: Four DDR3 DIMM slots
• Maximum memory: 8 GB (using four 2 GB modules)
PCI expansion options • One PCI Express x16 slot (for graphics card installation)
Display• ZX6350: 21.5-inch LCD panel
Audio• Two built-in 5W stereo speakers
I/O ports• Right panel
Media storage• 3.5-inch 25.4 mm 5400/7200 rpm SATA hard disk drive (HDD)
Card reader• 9-in-1 card reader slot
• One PCI Express x1 slot (for TV tuner card installation)
• ZX6351: 21.5-inch LCD touchscreen panel
• ZX4350: 23-inch LCD panel
• ZX4351: 23-inch LCD touchscreen panel
• Realtek ALC888S 7.1+2 Channel High Definition Audio Codec
– USB ports (two)
– Headphone jack
– Microphone jack
• Left panel
– HD dual digital TV tuner (optional)
– PS/2 keyboard and mouse ports
– Line-in, line-out, and microphone jacks
– Line-in and line-out jacks
– USB ports (four)
– eSATA port
– Ethernet jack (RJ-45)
– External display (VGA) port
– Serial-to-DVI port (optional)
– HDMI port
– PS/2 keyboard and mouse ports
• Flashing blue – System is in standby mode
5Auxiliary lighting capacitive key
6LCD brightness capacitive key
7Decrease volume capacitive key
8Increase volume capacitive key
NOTE: Icons for the capacitive keys are only visible when the system
is turned on.
Packard Bell oneTwo M3350 / oneTwo M3351 / oneTwo L5350 / oneTwo L5351 Service Guide3
Left View
ItemIconComponentItemIconComponent
1Optical disc drive (ODD)10Ethernet port (RJ-45)
2I/O cable cover11USB ports
39-in-1 card reader12eSATA port
4HD dual digital TV tuner
(optional)
5Line-in jack14Monitor port
6Line-out jack15HDMI port
7Microphone jack16PS/2 mouse port
8Line-in jack17PS/2 keyboard port
9Line-out jack18AC power jack
13Serial-to-DVI port (optional)
4Packard Bell oneTwo M3350 / oneTwo M3351 / oneTwo L5350 / oneTwo L5351 Service Guide
Right View
ItemIconComponent
1Microphone jack
2Line-out jack
3USB ports
Packard Bell oneTwo M3350 / oneTwo M3351 / oneTwo L5350 / oneTwo L5351 Service Guide5
Rear View
ItemIconComponent
1Ventilation slots
2Mounting holes for wall mount option
3Computer stand
6Packard Bell oneTwo M3350 / oneTwo M3351 / oneTwo L5350 / oneTwo L5351 Service Guide
System chipsetnVIDIA GeForce 8200 (MCP78PV)
I/O controllerSIO ITE 8720
BIOS
ItemSpecification
BIOS chipAMI BIOS
Setup utilityCMOS Setup Utility
Packard Bell oneTwo M3350 / oneTwo M3351 / oneTwo L5350 / oneTwo L5351 Service Guide7
Memory
ItemSpecification
ControllerIntegrated in the AMD processor
Number of DIMM slot4
Maximum memory8 GB (using four 2 GB modules)
Data rate1333 MT/s
Supported capacities1 or 2 GB
DIMM type240-pin DDR3 SO-DIMM
Supported brandsA-Data, Apacer, Kingston, Transcend, Unifosa, Samsung
Population ruleYou can install memory modules in any combination as long as they match the above
specifications.
Hard Disk Drive
ItemSpecification
ControllerIntegrated in the nVIDIA GeForce 8200 (MCP78PV)
Form factor3.5-inch 9.5 mm
Interface SATA 2.0
Supported capacities
ControllerIntegrated in the nVIDIA GeForce 8200 (MCP78PV)
TypeDVD-Super Multi double-layer or Blu-ray Disc combo drive option
Form factorSlim type
Tray height (mm))12.7 mm
Interface SATA
Supported models
DVD-Super Multi
double-layer drive
Blu-ray Disc
combo drive
8Packard Bell oneTwo M3350 / oneTwo M3351 / oneTwo L5350 / oneTwo L5351 Service Guide
•HLDS GT31N
• PLDS DS-8A5SH
• Panasonic UJ141AL/UJ240A
• HLDS CT21N
Ethernet
ItemSpecification
ControllerMarvell 88E1116 Intel WG82567V Gigabit NIC
LAN protocol10/100/1000 Mbps
LAN connector typeRJ-45
Wireless LAN
ItemSpecification
ModelLite-On WN6607LH
Protocol802.11 b/g/n
Form factorPCIe Mini Card
Bluetooth
ItemSpecification
Model• Lite-On WB111C-C1
• Xavi BC10B-04C1
VersionBluetooth 2.1 + EDR
Audio
ItemSpecification
ControllerRealtek ALC888S 7.1+2 Channel High Definition Audio Codec
Features• Two built-in 5W stereo speakers
• Right panel audio jacks
– Headphone jack
– Microphone jack
• Left panel audio jacks
– Line-in, line-out, and microphone jacks
– Line-in and line-out jacks
• Delta DPS-220UB-1 A / DPS-220UB A / DPS-220UB-2 B
• Chicony CPB09-D220R / CPB09-D220A / CPB09-D220E
10Packard Bell oneTwo M3350 / oneTwo M3351 / oneTwo L5350 / oneTwo L5351 Service Guide
Chapter 2
System Utilities
CMOS Setup Utility
CMOS Setup Utility is a hardware configuration program built into the system ROM. Since most systems are
already properly configured and optimized, there is normally no need to run this utility.
You will need to run this utility under the following conditions:
•When changing the system configuration including:
•Setting the system time and date
•Configuring the system drives and peripherals
•Specifying the boot device sequence
•Configuring the power management modes
•Setting up system passwords or making other changes to the security setup
•When trying to resolve IRQ conflicts
•When a configuration error is detected by the system and you are prompted ("Run Setup" message) to
make changes to the BIOS settings.
The Setup Utility loads the configuration values in a battery-backed nonvolatile memory called CMOS RAM.
This memory area is not part of the system RAM, which allows configuration data to be retained when power is
turned off. The values take effect when the system is booted. POST uses these values to configure the
hardware. If the values and the actual hardware do not agree, POST generates an error message. You must
run this utility to change the hardware settings from the default or current configuration.
IMPORTANTIf you repeatedly receive “Run Setup” messages, the RTC battery located on the mainboard
(BT1) may be defective. In this case, the system cannot retain configuration values in CMOS.
Replace the RTC battery with a new one.
NOTE For ease of reading, CMOS Setup Utility will be simply referred to as “Setup” or “Setup Utility” in this
Service Guide.
Packard Bell oneTwo M3350 / oneTwo M3351 / oneTwo L5350 / oneTwo L5351 Service Guide11
Accessing the Setup Utility
1.Turn on the computer.
If the computer is already turned on, save your data and close all open applications, then restart the
computer.
2.During POST, press Delete.
If you fail to press Delete before POST is completed, you will need to restart the computer.
Use the Up/Down/Left/Right arrow keys to move between the menu options, then press Enter to execute that
option.
Some options lead to pop-up dialog boxes that prompt you to verify that you wish to execute that option. Other
options lead to dialog boxes that prompt you for information.
Some options (marked with a ) lead to submenus that enable you to change the values for the option. Use
the Up/Down/Left/Right arrow keys to scroll through the items in the submenu
12Packard Bell oneTwo M3350 / oneTwo M3351 / oneTwo L5350 / oneTwo L5351 Service Guide
Navigating through the Setup Utility
Use the keys listed in the legend bar on the bottom of the Setup screen to work your way through the various
menu and submenu screens of the Setup Utility. The table below lists these legend keys and their respective
functions.
KeyFunction
Up/Down/Left/
Right arrow keys
Enter• To open the page for the currently selected menu/submenu
PgUp and PgDn Move the cursor to the previous and next page of a multipage menu.
HomeMove the cursor to the first page of a multipage menu.
EndMove the cursor to the last page of a multipage menu.
+ and - To select a value for the currently selected field (only if it is user-configurable). Press these
Esc If you press this key:
F1To bring up the General Help window. The General Help window describes other Setup
F9Press to load default system values.
F10 Press to save changes and close the Setup Utility.
Move the cursor to the menu/field you want.The currently selected field will be highlighted.
• To apply a field value.
keys repeatedly to display all possible entries. A parameter that is enclosed in square
brackets [ ] is user-configurable. Grayed-out parameters are not user-configurable for one
of the following reasons:
• The field value is auto-configured or auto-detected.·
• The field value is informational only.
• The field is password-protected.
• On one of the primary menu screens, the Exit menu displays.
• On a submenu screen, the previous screen displays.
• When you are making selections from a pop-up menu, cl oses the pop-u p wit hout mak ing
a selection.
navigation keys that are not displayed on the legend bar.
Setup Utility Menus
The Setup Utility has twelve menus for configuring the various system functions. These include:
• Product Information
• Standard CMOS Features
• Advanced BIOS Features
• Advanced Chipset Features
• Integrated Peripherals
• Power Management Setup
NOTES • The screenshots used in this section are for illustration only. The values displayed may not be
the same as those in your computer.
• In the descriptive tables following each of the menu screen illustrations, settings in boldface are
the default and suggested settings.
Packard Bell oneTwo M3350 / oneTwo M3351 / oneTwo L5350 / oneTwo L5351 Service Guide13
• PC Health Status
• Frequency/Voltage Control
• BIOS Security Features
• Load Default Settings
• Save & Exit Setup
• Exit Without Saving
Product Information
.
FieldDescription
Processor TypeType of processor installed on the system
Processor SpeedSpeed of the processor installed on the system
System MemorySize of system memory detected during boot-up
Product NameOfficial model name of the computer.
System Serial NumberSystem serial number.
System BIOS VersionCurrent system BIOS version
BIOS Release DateDate when the CMOS setup utility was released.
Asset Tag NumberSystem asset tag number
14Packard Bell oneTwo M3350 / oneTwo M3351 / oneTwo L5350 / oneTwo L5351 Service Guide
Standard CMOS Features
FieldDescriptionValue
System DateSets the system date.MM/DD/YYYY
(month/day/year)
System TimeSets the system time.HH:MM:SS
(hour:minute:second)
AHCI Port 1–4Your computer supports four SATA channels, each channel allows one SATA device to be
installed. Press Enter to display the individual configuration screen of installed SATA
drive(s).
Halt OnDetermines whether the system wil l stop for an error during the
POST. Options include:
• All Errors - Any error detected will pause the system.
• No Errors - BIOS will ignore any errors detected during
POST
• All, but Keyboard - If a keyboard error is detected, BIOS will
pause the system.
All Errors
No Errors
All, But Keyboard
Packard Bell oneTwo M3350 / oneTwo M3351 / oneTwo L5350 / oneTwo L5351 Service Guide15
Advanced BIOS Features
FieldDescriptionValue
Quick BootWhen enabled, the system starts up more qui ckly be eli minati on some of
the POST routines.
Quiet BootWhen enabled, BIOS will show a full screen logo when booting; if
disabled, BIOS will show the diagnostic POST screen when booting.
1st/2nd/3rd/4th
Boot Device
Hard Disk Drive
Priority
Optical Disk Drive
Priority
Removable Device
Priority
Network Device
Priority
Bootup Num-LockIf you set this item to On, the keyboard Num Lock key will be active when
Boot Sector Virus
Protection
USB Beep
Message
Displays the device assigned to the specified boot sequence. The Setup Utility attempts
to boot the operating system in this order. By default, the computer searches for boot
devices in the following order:
• Hard disk
• Optical drive (CD/DVD)
• Removable device
• Network boot (LAN)
Press Enter to specify the boot device priority sequence for the installed hard drive(s).
Press Enter to specify the boot device priority sequence for the installed optical drive.
Press Enter to specify the boot device priority sequence for removable drives.
Press Enter to specify the boot device priority sequence foe available network drives.
the computer boots up.
If set to Disabled, when anything attempts to access the boot sector or
hard disk partition table, there will be no warning message.
Select whether to allow the BIOS to emit error beeps or display error
messages during USB device enumeration.
Enabled
Disabled
Enabled
Disabled
On
Off
Enabled
Disabled
Enabled
Disabled
16Packard Bell oneTwo M3350 / oneTwo M3351 / oneTwo L5350 / oneTwo L5351 Service Guide
Advanced Chipset Features
FieldDescriptionValue
AMD Cool ’n’
Quiet
AMD-VSelect whether to enable the AMD-V Technology. This technology
Memory Hole
Remapping
Hybrid SLISelect whether to enable the Hybrid SLI technology when a nVIDIA
Primary VideoWhen a graphics card is installed, you have the option to select
UMA Frame Buffer
Size
Current UMA SizeDisplays the size of video memory (located in upper memory area–UMA) detected during
Select whether to enable the AMD Cool 'N' Quiet Technology. This
technology allows a compliant OS to dynamically adj ust the system
voltage and core frequency for reduced heat and noise emission.
allows a single platform to run multiple operating systems in
independent partitions.
When enabled, some or all of the memory between the 2 GB and
4
GB limits to addresses above 4 GB. This is a workaround for the
PCI hole or PCI memory hole which is a limit ation of 32-bit hardware
and 32-bit operating systems that causes a computer to appear to
have less memory available than is physically installed.
Note: This feature is useful for systems running on 64-bit OS and
those 32-bit systems that support the Physical Address Extension
method.
graphics card is installed. Hybrid SLI increases graphics
performance with GeForce
management with HybridPower™.
which graphics controller to activate.
Note: When this field is set to Auto, the graphics controller priority
sequence is: PCIE, Onboard, then PCI.
When a graphics card is installed, you can select how the system
video memory (frame buffer) is allotted.
boot-up.
®
Boost and provides intelligent power
Enabled
Disabled
Enabled
Disabled
Enabled
Disabled
Enabled
Disabled
Auto
PCIE
Onboard
PCI
Auto
32 MB
64 MB
128 MB
256 MB
Packard Bell oneTwo M3350 / oneTwo M3351 / oneTwo L5350 / oneTwo L5351 Service Guide17
Integrated Peripherals
FieldDescriptionValue
Onboard SATA
Controller
Onboard SATA
Mode
Onboard USB
Controller
Legacy USB
Support
USB Storage
Emulation
Onboard Graphics
Controller
Onboard Audio
Controller
Onboard LAN
Controller
Onboard LAN
Option ROM
Enables or disables the onboard SATA controller.Enabled
Set the operating mode for the onboard SATA controller.Native IDE
Enables or disables the onboard USB controller.Enabled
Enables or disables support for a USB mouse and USB keyboard. When
enabled, any attached USB mouse or USB keyboard can control the
system even when there is no USB driver loaded onto the system.
If set to Auto, a USB devices with a capacity of equal or less than 2 GB
will be emulated as a bootable floppy disk.
Enables or disables the onboard graphics controller.Enabled
Enables or disables the onboard audio controller.Enabled
Enables or disables the onboard LAN controller.Enabled
Enables or disables the onboard LAN option ROM function. Enabled
Disabled
Disabled
Enabled
Disabled
Auto
Floppy
Hard Disk
Disabled
Disabled
Disabled
Disabled
18Packard Bell oneTwo M3350 / oneTwo M3351 / oneTwo L5350 / oneTwo L5351 Service Guide
Power Management Setup
FieldDescriptionValue
ACPI Suspend
Mode
Deep Power Off
Mode
Power On by RTC
Alarm
Power On by PCIE
Devices
Power On by PCI
Devices
Power On by
Modem Ring
Power On by
Onboard LAN
Use this item to define how your system suspends. Default value is S3
(STR), the suspend mode is suspend to RAM, i.e., the system shuts
down with the exception of a refresh current to the system memory.
Enables or disables compliance to the Energy-using Products Lot 6
Directives (EuP Lot 6).
Enables or disables the system to wake up from a power-saving mode
when an RTC alarm occurs.
Enables or disables the system to wake up from a power-saving mode
when an event occurs on an installed PCI Express device.
Enables or disables the system to wake up from a power-saving mode
when an event occurs on an installed PCI device.
Enables or disables the system to wake up from a power-saving mode
when a modem signal is received. network message
Enables or disables the system to wake up from a power-saving mode
when the onboard LAN controller received a network message.
S3 (STR)
S1 (POS)
Enabled
Disabled
Enabled
Disabled
Enabled
Disabled
Enabled
Disabled
Enabled
Disabled
Enabled
Disabled
Wake Up by PS/2
KB/Mouse
Wake Up by USB
KB/Mouse
Restore On AC
Power Loss
Enables or disables the system to wake up from a power-saving mode
when a PS/2 keyboard or mouse is used.
Enables or disables the system to wake up from a power-saving mode
when a USB keyboard or mouse is used.
Select the power state when an AC power loss occurs.
• Off - The computer remains off until the power button is pressed.
• Last State - The computer reverts to the last power state before the
power loss occurred.
• On - The computer switches back on after the AC power loss.
Enabled
Disabled
Enabled
Disabled
Power Off
Power On
Last State
Packard Bell oneTwo M3350 / oneTwo M3351 / oneTwo L5350 / oneTwo L5351 Service Guide19
PC Health Status
FieldDescriptionValue
CPU Temperature
System Temperature
CPU Fan Speed
System Fan Speed
CPU Core
+1.1V
+3.30V
+5.00V
+12.0V
5VSB
VBAT
Smart FanWhen enabled, fan speed will speed up or slow down depending on
These items lets you monitor the parameters for critic al voltages, temperatures and
fan speeds.
the system temperature.
Enabled
Disabled
20Packard Bell oneTwo M3350 / oneTwo M3351 / oneTwo L5350 / oneTwo L5351 Service Guide
Frequency/Voltage Control
FieldDescriptionValue
Enable Clock to All
DIMM/PCI
Spread SpectrumWhen the mainboard's clock generator pulse s, the extreme va lues of
When enabled, clock signals will be sent to the PCI and memory
slots regardless of whether the slot is occupied or not.
the pulses creates EMI (electromagnetic interference). Set this field
to Enabled to reduce this EMI level. This reduces interference
problems with other electronics in the area.
Note: Remember to disable the Spread Spectrum feature if you are
overclocking. A slight jitter can introduce a temporary boost in clock
speed causing the overclocked processor to lock up.
Enabled
Disabled
Enabled
Disabled
Packard Bell oneTwo M3350 / oneTwo M3351 / oneTwo L5350 / oneTwo L5351 Service Guide21
BIOS Security Features
FieldDescriptionValue
Supervisor PasswordDisplays the supervisor password status. When set to Installed, this
password will allow the user to access and chan ge all settings in the
Setup Utility.
User PasswordDisplays the user password status. Only the following menus will be
accessible when this password is set as Installed:
• System Date and System Time
• Exit Without Saving
Change Supervisor
Password
Change User
Password
Press Enter to change the supervisor password.
Press Enter to change the user password.
Installed
Not Installed
Note the following before you define a system password:
•The maximum length of password contains 8 alphanumeric characters. The following keys are valid:
•When you are prompted to enter a password, you have three tries before the system halts. Do not forget
your password. If you forget your password, you may have to return your computer to your dealer to reset
it.
22Packard Bell oneTwo M3350 / oneTwo M3351 / oneTwo L5350 / oneTwo L5351 Service Guide
To set a system password:
NOTE You need to set a supervisor password first before setting the user password.
1.Select Change Supervisor Password or Change User Password, then press Enter.
The password box appears.
2.Type a password then press Enter.
IMPORTANTBe very careful when typing your password because the characters do not appear on the
screen. Only shaded blocks representing each typed character are visible.
3.Retype the password to verify the first entry, then press Enter .
You will be prompted to save the new password.
4.Press Enter.
5.Press F10 to save the password and close the Setup Utility.
To change a system password:
1.Select Change Supervisor Password or Change User Password, then press Enter.
The password box appears.
2.Type the original password, then press Enter.
3.Type a new password, then press Enter.
4.Retype the new password to verify the first entry, then press Enter.
You will be prompted to save the new password.
5.Press Enter.
6.Press F10 to save the password and close the Setup Utility.
To remove a system password:
NOTE When the supervisor password is removed, the user password will also be remove.
1.Select Change Supervisor Password or Change User Password, then press Enter.
The password box appears.
2.Type the original password, then press Enter.
3.Press Enter twice without entering anything in the new and confirm password fields.
You will be prompted to confirm the password removal.
4.Press Enter.
5.Press F10 to save the changes you made and close the Setup Utility.
Packard Bell oneTwo M3350 / oneTwo M3351 / oneTwo L5350 / oneTwo L5351 Service Guide23
Load Default Settings
Execute this menu to load the factory-default settings for all Setup parameters. Keyboard shortcut: F9
Perform the steps below to load the system default settings:
1.Select Load Default Settings, then press Enter.
You will be prompted to load the system defaults.
2.Select OK, then press Enter.
3.Press F10 to save the changes you made and close the Setup Utility.
Save & Exit Setup
Execute this menu to save the changes made and closes the Setup Utility. Keyboard shortcut: F10
Exit Without Saving
Execute this menu to closes the Setup Utility without making any changes.
24Packard Bell oneTwo M3350 / oneTwo M3351 / oneTwo L5350 / oneTwo L5351 Service Guide
Chapter 3
System Disassembly
This chapter provides step-by-step instructions on how to disassemble the computer for maintenance and
troubleshooting purposes.
Disassembly Tools
In performing the disassembly process, you will need the following tools:
•Wrist-grounding strap and conductive mat for preventing electrostatic discharge
•Philips screwdriver
•Hex screwdriver
•Flat screwdriver
NOTES • To reinstall the system components and assemble the unit, perform the disassembly procedures in
reverse.
• The screws for the different components vary in size. D
screws with their corresponding components to avoid mismatches when putting back the
components.
uring the disassembly process, group the
Pre-disassembly Procedure
Before proceeding with the disassembly procedure, perform the steps listed below:
1.Make sure th
2.T
urn off the power to the computer and all peripherals.
3.Unplug the power cord from the computer.
4.Unplug the network cable and all connected peripheral devices from the computer.
5.Place the computer on
at the optical disc drive and the card reader slot are empty.
a flat, steady surface with the rear cover facing upward.
Packard Bell oneTwo M3350 / oneTwo M3351 / oneTwo L5350 / oneTwo L5351 Service Guide25
Disassembly Procedures
Removing the Computer Stand
1.Perform the “Pre-disassembly Procedure” on page 25.
2.Use a fl
at screwdriver to pry off the plastic shell covering the computer stand screws.
3.Remove the screws securin
QuantityColorTorquePart Number
6Black4.0–4.5 kgf-cm86.00N85.266
4.Remove the computer st
and.
g the computer stand.
26Packard Bell oneTwo M3350 / oneTwo M3351 / oneTwo L5350 / oneTwo L5351 Service Guide
Removing the I/O Cable Cover
1.Use a flat screwdriver to pry off the I/O cable cover.
2.Remove the I/
O cable cover
Removing the Rubber Feet
1.Perform the “Pre-disassembly Procedure” on page 25.
2.Use a fl
at screwdriver to pry off the rubber feet from the computer base.
Packard Bell oneTwo M3350 / oneTwo M3351 / oneTwo L5350 / oneTwo L5351 Service Guide27
Removing the Rear Cover
1.Remove the computer stand by following the procedure described on page 26.
2.Remove the I/O cable cover and the rubber feet by following the procedures described on page 27.
3.Use a flat screwdriver to carefully pry loose the rear cover from the front bezel.
The picture below shows the location of the plastic sna
4.Toggle the cover from left to right to loosen its hold on the front bezel, then detach the rear cover.
ps securing the rear cover to the front bezel.
Removing the I/O Cable Plate
1.Remove the rear cover by following the procedure described in the previous section.
2.Push the latch to disengage the I/O cable plate from the main chassis.
28Packard Bell oneTwo M3350 / oneTwo M3351 / oneTwo L5350 / oneTwo L5351 Service Guide
3.Remove the I/O cable plate.
Removing the Optical Disc Drive
1.Remove the rear cover by following the procedure described on page 28.
2.Remove the screw securing
the ODD.
QuantityColorTorquePart Number
1Black4.0–4.5 kgf-cm86.00B75.240
3.Slide the ODD outward, then disconnect the ODD SATA cable from the drive.
Packard Bell oneTwo M3350 / oneTwo M3351 / oneTwo L5350 / oneTwo L5351 Service Guide29
4.Remove the ODD from the main chassis.
5.Remove the screw securi
QuantityColorTorquePart Number
1Silver1.3–1.5 kgf-cm86.7A122.4R0
6.Det
ach the ODD bezel from the module.
ng the ODD bracket.
30Packard Bell oneTwo M3350 / oneTwo M3351 / oneTwo L5350 / oneTwo L5351 Service Guide
Removing the Scaler Board
1.Remove the rear cover by following the procedure described on page 28.
2.Remove the screw securing the scaler board cover.
QuantityColorTorquePart Number
1Black4.0–4.5 kgf-cm86.00B75.240
3.Slid
4.Discon
e the scaler board cover towards the speaker area to disengage the cover tabs from the main chassis,
then remove the scaler board cover.
nect all the cables from the scaler board.
Packard Bell oneTwo M3350 / oneTwo M3351 / oneTwo L5350 / oneTwo L5351 Service Guide31
5.Remove the screws securing the scaler board.
QuantityColorTorquePart Number
4Black4.0 kgf-cm86.00B75.240
6.Remove the scaler board.
2
A circuit board that is >10 cm
has been highlighted with a yellow rectangle as shown in the
above image. Follow local regulations for disposing this type of circuit board.
32Packard Bell oneTwo M3350 / oneTwo M3351 / oneTwo L5350 / oneTwo L5351 Service Guide
Removing the USB/Audio Board
1.Remove the rear cover by following the procedure described on page 28.
2.Remove the screw securing the USB/audio board cover.
QuantityColorTorquePart Number
1Black4.0–4.5 kgf-cm86.00B75.240
3.Slid
4.Discon
e the USB/audio board cover outward to disengage the cover tabs from the main chassis, then
remove the USB/audio board cover.
nect the two cables from the USB/audio board.
Packard Bell oneTwo M3350 / oneTwo M3351 / oneTwo L5350 / oneTwo L5351 Service Guide33
5.Remove the screws securing the USB/audio board.
QuantityColorTorquePart Number
2Black4.0 kgf-cm86.00B75.240
6.Slide the USB/audio board out of its tabs.
2
A circuit board that is >10 cm
has been highlighted with a yellow rectangle as shown in the
above image. Follow local regulations for disposing this type of circuit board.
34Packard Bell oneTwo M3350 / oneTwo M3351 / oneTwo L5350 / oneTwo L5351 Service Guide
Removing the Wall Mount Plate
1.Remove the rear cover by following the procedure described on page 28.
2.Remove the screws securing the wall mount plate.
QuantityColorTorquePart Number
2Black4.0–4.5 kgf-cm86.00B75.240
3.Slid
e the wall mount plate towards the HDD area to disengage the plate tabs from the main chassis, then
remove the wall mount plate.
Packard Bell oneTwo M3350 / oneTwo M3351 / oneTwo L5350 / oneTwo L5351 Service Guide35
Removing the TV Tuner Card
1.Remove the wall mount plate by following the procedure described in the previous section.
2.Disconnect the TV tuner card cable.
3.Remove the screw securing th
QuantityColorTorquePart Number
1Black4.0–4.5 kgf-cm86.00B75.240
4.Discon
nect TV tuner card from its expansion slot.
e TV tuner card bracket.
36Packard Bell oneTwo M3350 / oneTwo M3351 / oneTwo L5350 / oneTwo L5351 Service Guide
Removing the Graphics Card
1.Remove the wall mount plate by following the procedure described on page 35.
2.Remove the screw securing the inverter board cover.
QuantityColorTorquePart Number
1Black4.0–4.5 kgf-cm86.00B75.240
3.Remove the inverter board cover.
4.D
isconnect the HDMI cable from the graph ics card .
Packard Bell oneTwo M3350 / oneTwo M3351 / oneTwo L5350 / oneTwo L5351 Service Guide37
5.Remove the hex screws securing the serial-to-DVI ca bl e.
QuantityColorTorquePart Number
2Silver4.5 kgf-cm86.80536.7R2
6.Disconnect the serial-to-DVI cable from the graphics card.
7.Discon
38Packard Bell oneTwo M3350 / oneTwo M3351 / oneTwo L5350 / oneTwo L5351 Service Guide
nect the graphics card assembly from its expansion slot.
8.Remove the screw securing the graphics card bracket.
QuantityColorTorquePart Number
1Black4.0–4.5 kgf-cm86.00B75.240
9.Discon
nect the graphics card from its riser board.
A circuit board that is >10 cm
above image. Follow local regulations for disposing this type of circuit board.
10. Remove the screws securing
2
has been highlighted with a yellow rectangle as shown in the
the graphics card riser board.
QuantityColorTorquePart Number
2Black4.0–4.5 kgf-cm86.00B75.240
Packard Bell oneTwo M3350 / oneTwo M3351 / oneTwo L5350 / oneTwo L5351 Service Guide39
11. Remove the graphics card riser board from its bracket.
Removing the Hard Disk Drive
1.Remove the graphics card by following the procedure described on page 37.
2.Discon
nect the power and SATA cables from the hard drive.
3.Slid
40Packard Bell oneTwo M3350 / oneTwo M3351 / oneTwo L5350 / oneTwo L5351 Service Guide
e the HDD assembly outward to disengage the assembly from the main chassis, then remove the
HDD assembly.
4.Disconnect the HDD SATA cable from the mainboard.
5.Remove the screws securing
QuantityColorTorquePart Number
4Silver4.0–4.5 kgf-cm86.00J44.C60
6.Use a small metal screwdriver to push the hard drive out of its cage (a), then pull out the drive out (b).
the hard drive to its cage.
Packard Bell oneTwo M3350 / oneTwo M3351 / oneTwo L5350 / oneTwo L5351 Service Guide41
Removing the Inverter Board
1.Remove the wall mount plate by following the procedure described on page 35.
2.Remove the inverter board cover by following steps 2 and 3 on page 37.
3.Disconnect all cables from the inverter board.
4.Remove the screws securing
QuantityColorTorquePart Number
3Black4.0 kgf-cm86.00B75.240
the inverter board.
42Packard Bell oneTwo M3350 / oneTwo M3351 / oneTwo L5350 / oneTwo L5351 Service Guide
5.Remove the inverter board.
2
A circuit board that is >10 cm
above image. Follow local regulations for disposing this type of circuit board.
has been highlighted with a yellow rectangle as shown in the
Removing the Heat Sink Fan (HSF) Assembly
1.Remove the wall mount plate by following the procedure described on page 35.
2.Discon
nect the HSF cable from its mainboard connector.
Packard Bell oneTwo M3350 / oneTwo M3351 / oneTwo L5350 / oneTwo L5351 Service Guide43
3.Loosen the HSF's spring-loaded screws in a diagonally opposite pattern (an "X" pattern).
QuantityColorTorquePart Number
4Silver4.0–4.5 kgf-cm–
4.Remove the HSF
assembly.
Removing the Processor
1.Remove the HSF assembly by following the procedure described on the previous section.
2.Press
down the socket lever, then move it left to release.
44Packard Bell oneTwo M3350 / oneTwo M3351 / oneTwo L5350 / oneTwo L5351 Service Guide
3.Rotate the socket lever to the open position.
4.Gently lift the processor out of its socket.
CAUTION DO NOT lay the processor on its base to avoid bending or damaging the pins underneath it.
IMPORTANTWhen installing a processor:
• Note the golden arrow on the corner to make sure the processo
the socket.
• Moisten a soft cloth with isopropyl alcohol and clean the processor die to remove any
thermal grease residue. Wipe the die surface several times to make sure that no particles
or dust contaminants are evident. Allow the alcohol to evaporate before continuing. Apply
just enough thermal grease to evenly coat the surface of the processor die.
r is properly oriented over
Packard Bell oneTwo M3350 / oneTwo M3351 / oneTwo L5350 / oneTwo L5351 Service Guide45
Removing the Memory Modules
1.Remove the wall mount plate by following the procedure described on page 35.
2.Open the holding clips securing the memory modules (a), then remove the memory modules from the DIMM slots (b).
Removing the RTC Battery
1.Remove the wall mount plate by following the procedure described on page 35.
2.Det
ach the socket latch from the RTC battery.
3.Remove the R
46Packard Bell oneTwo M3350 / oneTwo M3351 / oneTwo L5350 / oneTwo L5351 Service Guide
TC battery from its socket.
The RTC battery has been highlighted with a yellow circle in the above image. Detach the RTC
and follow local regulations for disposing it.
battery
Removing the Mainboard
1.Remove the TV tuner card by following the procedure described on page 36.
2.Remove the graphics card by following the procedure described on page 37
3.Remove the hard drive by following the procedure described on page 40.
4.Remove the HSF
5.Remove the processor by following the procedure described on page 44.
6.Remove the memory modules by following the procedure described on page 46.
7.Remove the R
8.Remove the hex screws securing the serial-to-DVI ca bl e .
assembly by following the procedure described on page 43.
TC battery by following the procedure described on the previous section.
QuantityColorTorquePart Number
2Silver4.5 kgf-cm86.80536.7R2
9.Detach the serial-to-DVI cable from the I/O port panel bracket.
Packard Bell oneTwo M3350 / oneTwo M3351 / oneTwo L5350 / oneTwo L5351 Service Guide47
10. Disconnect all cables from the upper edge area of the mainboard.
11. Discon
12. Remove the screws securing the mainboard.
nect the 4-pin and 20-pin ATX power cables from their mainboard connectors.
a.Press the
b. Pull
top portion of the cable’s retaining latch
the cable straight up from its connector.
QuantityColorTorquePart Number
6Black4.0 kgf-cm86.00B75.240
48Packard Bell oneTwo M3350 / oneTwo M3351 / oneTwo L5350 / oneTwo L5351 Service Guide
13. Remove the mainboard.
2
A circuit board that is >10 cm
above image. Follow local regulations for disposing this type of circuit board.
has been highlighted with a yellow rectangle as shown in the
Removing the Power Supply Unit
1.Disconnect the scalar board power cable by performing steps 1–4 of the scalar board removal procedure
on page 31.
2.Disconnect the hard drive power cable by performing steps 1 and 2 of the HDD removal procedure on
page 40.
3.Disconnect the ATX power cables by performing step 11 of the mainboard removal procedure on page 48.
4.Remove the screws securing the PSU to the main chassis.
QuantityColorTorquePart Number
3Silver4.0 kgf-cm86.00J44.C60
Packard Bell oneTwo M3350 / oneTwo M3351 / oneTwo L5350 / oneTwo L5351 Service Guide49
wer supply unit from the front bezel and lay it down beside the system.
Some PSU connector cables are still secured underneath the main chassis so you won’t be able to
remov
e the PSU completely
50Packard Bell oneTwo M3350 / oneTwo M3351 / oneTwo L5350 / oneTwo L5351 Service Guide
Removing the Touchscreen Control Board
1.Remove the PSU by following the procedure described on page 49.
2.Detach the black tape from the touchscreen control board cables.
3.Push th
4.Remove the touchscree
e tabs securing the touchscreen control board.
n control board and turn it over to expose the cable connectors underneath it.
A circuit board that is >10 cm2 has been highlighted with a yellow rectangle as shown in the
above image. Follow local regulations for disposing this type of circuit board.
Packard Bell oneTwo M3350 / oneTwo M3351 / oneTwo L5350 / oneTwo L5351 Service Guide51
5.Disconnect all cables from the touchscreen control board.
Removing the Bluetooth Module
1.Remove the PSU by following the procedure described on page 49.
2.Push th
e tabs securing the Bluetooth module.
3.Remove the Blue
underneath it.
52Packard Bell oneTwo M3350 / oneTwo M3351 / oneTwo L5350 / oneTwo L5351 Service Guide
tooth module from the front bezel and turn it over to expose the cable connector
4.Disconnect the Bluetooth cable from the module.
Removing the Power Button Assembly
1.Remove the PSU by following the procedure described on page 49.
2.Push th
e tabs securing the power button assembly.
3.Remove the power button assembly from the front bezel.
Packard Bell oneTwo M3350 / oneTwo M3351 / oneTwo L5350 / oneTwo L5351 Service Guide53
Removing the LCD Assembly
1.Remove the I/O cable plate by following the procedure described on page 28.
2.Remove the optical drive by following the procedure described on page 29.
3.Remove the scaler board by following the procedure described on page 31
4.Remove
5.Remove the mainboard by following the procedure described on page 47.
6.Remove the PSU by following the procedure described on page 49.
7.Discon
the USB/audio board by following the procedure described on page 33.
nect the IR cable from the front bezel.
8.Discon
9.Remove the spea
nect the light bar cables from the light bars.
kers.
54Packard Bell oneTwo M3350 / oneTwo M3351 / oneTwo L5350 / oneTwo L5351 Service Guide
10. Disconnect the capacitive LED board cable.
11. Discon
12. Remove the screws securing the main chassis.
nect the webcam cable.
QuantityColorTorquePart Number
5Black4.0 kgf-cm86.3AR26.8R0
Packard Bell oneTwo M3350 / oneTwo M3351 / oneTwo L5350 / oneTwo L5351 Service Guide55
13. Push back the plastic snaps securing the LCD assembly to the front bezel.
14. Detach the LCD assembly from the front bezel.
Removing the Main Chassis
1.Remove the LCD assembly by following the procedure described on page 54.
2.Remove the screws securing
QuantityColorTorquePart Number
4Black4.0 kgf-cm86.00B75.240
56Packard Bell oneTwo M3350 / oneTwo M3351 / oneTwo L5350 / oneTwo L5351 Service Guide
the main chassis to the LCD module.
3.Remove the main chassis from the LCD module and lay it down beside the LCD module.
4.Rele
5.Remove the t
ase the inverter cables from the main chassis.
apes securing the system cables, then release the cables from their main chassis latches.
Packard Bell oneTwo M3350 / oneTwo M3351 / oneTwo L5350 / oneTwo L5351 Service Guide57
Removing the LCD Cable
1.Remove the main chassis by following the procedure described on page 56.
2.Remove the tapes securing the LCD cable (a), then disconnect the cable from the LCD board (b).
Removing the LCD Board Cover
1.Remove the main chassis by following the procedure described on page 56.
2.Remove the screws securing the LCD board cover.
QuantityColorTorquePart Number
3Silver––
3.Remove the LCD
58Packard Bell oneTwo M3350 / oneTwo M3351 / oneTwo L5350 / oneTwo L5351 Service Guide
board cover.
Removing the Webcam Module
1.Remove the LCD assembly by following the procedure described on page 54.
2.Push the tabs securing the webcam module.
3.Push th
e tabs securing the webcam module, then remove the module from the front bezel.
Removing the Capacitive LED Board
1.Remove the LCD assembly by following the procedure described on page 54.
2.Remove the cap
acitive LED board cover.
Packard Bell oneTwo M3350 / oneTwo M3351 / oneTwo L5350 / oneTwo L5351 Service Guide59
3.Pry the capacitive LED board from the front bezel.
Removing the Light Bars
1.Remove the LCD assembly by following the procedure described on page 54.
2.Push th
e tabs securing both ends of the two light bars.
3.Remove the li
60Packard Bell oneTwo M3350 / oneTwo M3351 / oneTwo L5350 / oneTwo L5351 Service Guide
ght bars from the front bezel.
Chapter 4
Troubleshooting
This chapter lists the POST error indicators and BIOS beep codes, as well general troubleshooting
instructions.
Hardware Diagnostic Procedure
1.Obtain as much detail as possible about the symptoms of the system failure.
2.Verify the symptoms by attempting to recreate the failure by running the diagnostic tests or repeating th e
same operation.
3.Refer to “Power System Check” procedure on the next section and the “Beep Codes” section on page 76
to determine which corrective action to take.
System Check Procedures
IMPORTANTThe diagnostic tests described in this chapter are only intended to test Acer products.
Non-Acer products, prototype cards, or modified options can give false errors and invalid
system responses.
Power System Check
If the system can be powered on, skip this section. Proceed to the “System Internal Inspection” procedure on
the next page.
If the system will not power on, do the following:
•Check if the power cable is properly connected to the AC power jack and a functional AC power source.
•Check if the voltage selector switch is set to the correct voltage setting.
System External Inspection
1.Inspect the power and LED indicators on the front panel. Go to “Front View” section on page 3 for the
location and description of the LED behaviour.
2.Make sure that the ventilation slots on the rear panel are not blocked.
3.Make sure that there is no point of contact in the system that can cause a power short.
If the cause of the failure is still can not be determined, perform the “System Internal Inspection”
procedure described on the next page.
Packard Bell oneTwo M3350 / oneTwo M3351 / oneTwo L5350 / oneTwo L5351 Service Guide61
System Internal Inspection
1.Turn off the power to the computer and all peripherals.
2.Unplug the power cord from the computer.
3.Unplug the network cable and all connected peripheral devices from the computer.
4.Place the computer on a flat, steady surface.
5.Remove the side panel as described in page 20.
6.Verify that the processor, memory module(s), and expansion board(s) are properly seated.
7.Verify that all power and data cables are firmly and properly attached to the installed drives.
8.Verify that all cable connections inside the system are firmly and properly attached to their appropriate
mainboard connectors.
9.Verify that all components are Acer-qualified and supported.
10. Reinstall the side panel.
11. Power on the system.
If the cause of the failure is still can not be determined, review the POST messages and BIOS
checkpoints during the system startup.
Checkpoints
A checkpoint is either a byte or word value output to I/O port 80h. The BIOS outputs checkpoints during
bootblock and Power-On Self Test (POST) to indicate the task the system is currently executing. Checkpoints
are very useful in aiding software developers or technicians in debugging problems that occur during the
pre-boot process.
Viewing BIOS Checkpoints
Viewing all checkpoints generated by the BIOS requires a checkpoint card, also referred to as a POST card or
POST diagnostic card. These are ISA or PCI add-in cards that show the value of I/O port 80h on a LED
display. Checkpoints may appear on the bottom right corner of the screen during POST . This display method is
limited, since it only displays checkpoints that occur after the video card has been activated.
NOTE Please note that checkpoints may differ between different platforms based on system
configuration. Checkpoints may change due to vendor requirements, system chipset or option
ROMs from add-in PCI devices.
Boot Block Initialization Code Checkpoints
The boot block initialization code sets up the chipset, memory, and other components before system memory
is available. The following table describes the type of checkpoints that may occur during the boot block
initialization portion of the BIOS.
CheckpointDescription
Before D1Early chipset initialization is done. Early super I/O initialization is done including RTC and
keyboard controller. NMI is disabled.
D1Perform keyboard controller BAT test. Check if waking up from power management
suspend state. Save power-on CPUID value in scratch CMOS.
D0Go to flat mode with 4GB limit and GA20 enabled. Verify the bootblock checksum.
D2Disable CACHE before memory detection. Execute full memory sizing module. Verify that
flat mode is enabled.
D3If memory sizing module not executed, start memory refresh and do memory sizing in
bootblock code. Do additional chipset initialization. Re-enable CACHE. Verify that flat
mode is enabled.
D4Test base 512 KB memory. Adjust policies and cache first 8 MB. Set stack.
62Packard Bell oneTwo M3350 / oneTwo M3351 / oneTwo L5350 / on eTwo L5351 Service Guide
CheckpointDescription
D5Bootblock code is copied from ROM to lower system memory and control is given to it.
BIOS now executes out of RAM.
D6Both key sequence and OEM specific method is checked to determine if BIOS recovery is
forced. Main BIOS checksum is tested. If BIOS recovery is necessary, control flows to
checkpoint E0. See the
information.
D7Restore CPUID value back into register. The Bootblock Runtime interface module is
moved to system memory and control is given to it. Determine whether to execute serial
flash.
D8The Runtime module is uncompressed into memory. CPUID information is stored in
memory .
D9S tore the Uncompressed pointer for future use in PMM. Copying Main BIOS into memory.
Leaves all RAM below 1
closing SMRAM.
DARestore CPUID value back into register. Give control to BIOS POST
(ExecutePOSTKernel). See the “POST Code Checkpoints” section for more information.
“Boot Block Recovery Code Checkpoints” section for more
MB Read-Write including E000 and F000 shadow areas but
Boot Block Recovery Code Checkpoints
The boot block recovery code gets control when the BIOS determines that a BIOS recovery is required
because the user has forced the update or the BIOS checksum is corrupt. Refer to “BIOS Recovery” section
on page 77 for more information. The following table describes the type of checkpoints that may occur during
the boot block recovery portion of the BIOS.
CheckpointDescription
E0Initialize the floppy controller in the super I/O. Some interrupt vectors are initialized. DMA
controller is initialized. 8259 interrupt controller is
E9Set up floppy controller and data. Attempt to read from floppy.
EAEnable ATAPI hardware. Attempt to read from ARMD and ATAPI CDROM.
EBDisable ATAPI hardware. Jump back to checkpoint E9.
EFRead error occurred on media. Jump back to checkpoint EB.
E9 or EADetermine information about root directory of recovery media.
F0Search for pre-defined recovery file name in root directory.
F1Recovery file not found.
F2Start reading FAT table and analyze FAT to find the clusters occupied by the recovery file.
F3Start reading the recovery file cluster by cluster.
F5Disable L1 cache.
FACheck the validity of the recovery file configuration to the current configuration of the flash
part.
FBMake flash write enabled through chipset and OEM specific method. Detect proper flash
part. Verify that the found flash part size equals the recovery file size.
F4The recovery file size does not equal the found flash part size.
FCErase the flash part.
FDProgram the flash part.
FFThe flash has been updated successfully. Make flash write disabled. Disable ATAPI
hardware. Restore CPUID value back into register. Give control to F000 ROM at
F000:FFF0h.
initialized. L1 cache is enabled.
Packard Bell oneTwo M3350 / oneTw o M3351 / oneTwo L5350 / oneTwo L5351 Service Guide63
POST Code Checkpoints
The POST code checkpoints are the largest set of checkpoints during the BIOS preboot process. The
following table describes the type of checkpoints that may occur
CheckpointDescription
03Disable NMI, Parity, video for EGA, and DMA controllers. Initialize BIOS, POST, Runtime
data area. Also initialize BIOS modules on POST entry and
as mentioned in the Kernel Variable "wCMOSFlags."
04Check CMOS diagnostic byte to determine if battery power is OK and CMOS checksum is
OK. Verify CMOS checksum manually by reading storage area.
If the CMOS checksum is bad, update CMOS with power-on default values and clear
passwords. Initialize status register A.
Initializes data variables that are based on CMOS setup questions.
Initializes both the 8259 compatible PICs in the system
05Initializes the interrupt controlling hardware (gene rally PIC) and interrupt vector table.
06Do R/W test to CH-2 count reg. Initialize CH-0 as system timer.Install the POSTINT1Ch
handler. Enable IRQ-0 in PIC for system timer interrupt. Traps INT1Ch vector to
"POSTINT1ChHandlerBlock."
08Initializes the CPU. The BAT test is being done on KBC. Program the keyboard controller
command byte is being done after Auto detection of
0AInitializes the 8042 compatible Key Board Controller.
0BDetects the presence of PS/2 mouse.
0CDetects the presence of Keyboard in KBC port.
0ETesting and initialization of different Input Devices. Also, update the Kernel Variables.
Traps the INT09h vector, so that the POST INT09h handler gets control for IRQ1.
Uncompress all available language, BIOS logo, and Silent logo
13Early POST initialization of chipset registers.
24Uncompress and initialize any platform specific BIOS modules. GPNV is initialized at this
checkpoint.
30Initialize System Management Interrupt.
2AInitializes different devices through DIM.
See DIM Code Checkpoints section for more information.
2CInitializes different devices. Detects and initializes the video adapter installed in the
system that have optional ROMs.
2EInitializes all the output devices.
31Allocate memory for ADM module and uncompress it. Give control to ADM module for
initialization. Initialize language and font modules for ADM.
33Initializes the silent boot module. Set the window for displaying text information.
37Displaying sign-on message, CPU information, setup key message, and any OEM
specific information.
38Initializes different devices through DIM. See DIM Code Checkpoints section for more
information. USB controllers are initialized at this point.
39Initializes DMAC-1 & DMAC-2.
3AInitialize RTC date/time.
3BTest for total memory installed in the system. Also, Check for DEL or ESC keys to limit
memory test. Display total memory in the system.
during the POST portion of the BIOS.
GPNV area. Initialized CMOS
KB/MS using AMI KB-5.
modules.
Activate ADM module.
64Packard Bell oneTwo M3350 / oneTwo M3351 / oneTwo L5350 / on eTwo L5351 Service Guide
CheckpointDescription
3CMid POST initialization of chipset registers.
40Detect different devices (Parallel ports, serial ports, and coprocessor in CPU, ... etc.)
successfully installed in the system and update the BDA,
50Programming the memory hole or any kind of implementation that needs an adjustment in
system RAM size if needed.
52Updates CMOS memory size from memory found in memory test. Allocates memory for
Extended BIOS Data Area from base memory. Programming the memory hole or any kind
of implementation that needs an adjustment
60Initializes Num-Lock status and programs the KBD typematic rate.
75Initialize Int-13 and prepare for IPL detection.
78Initializes IPL devices controlled by BIOS and option ROMs.
7AInitializes remaining option ROMs.
7CGenerate and write contents of ESCD in NVRam.
84Log errors encountered during POST.
85Display errors to the user and gets the user response for error.
87Execute BIOS setup if needed / requested. Check boot password if installed.
8CLate POST initialization of chipset registers.
8EProgram the peripheral parameters. Enable/Disable NMI as selected.
90Late POST initialization of system management interrupt.
A0Check boot password if installed.
A1Clean-up work needed before booting to OS.
A2Takes care of runtime image preparation for different BIOS modules. Fill the free area in
F000h segment with 0FFh. Initializes the Microsoft IRQ Routing Table. Prepares the
runtime language module. Disables the
A4Initialize runtime language module. Display boot option popup menu.
A7Displays the system configuration screen if enabled. Initialize the CPU’s before boot,
which includes the programming of the MTRR’s.
A8Prepare CPU for OS boot including final MTRR values.
A9Wait for user input at config display if needed.
AAUninstall POST INT1Ch vector and INT09h vector. Deinitializes the ADM module.
ABPrepare BBS for Int 19 boot.
ACEnd of POST initialization of chipset registers.
B1Save system context for ACPI.
00Passes control to OS Loader (typically INT19h).
in system RAM size if needed.
system configuration display if needed.
EBDA…etc.
Packard Bell oneTwo M3350 / oneTw o M3351 / oneTwo L5350 / oneTwo L5351 Service Guide65
DIM Code Checkpoints
The Device Initialization Manager (DIM) gets control at various times during BIOS POST to initialize different
system busses. The following table describes the main
CheckpointDescription
2AInitialize different buses and perform the following functions: Reset, Detect, and Disable
(function 5). Function 3 searches for and configures PCI input devices and detects if
system has standard keyboard controller. Function 4 searches for and configures all PnP
and PCI boot devices. Function 5 configures all onboard peripherals that are set to an
automatic configuration and configures all remaining PnP and PCI devices.
checkpoints where the DIM module is accessed.
POST Error Indicators
When a system error is detected during POST (Power On Self Text), the Setup utility will switch to diagnostic
mode and will either:
•Displays a POST error message, or
•Emits a series of beep codes
POST Error Messages
POST error messages tell users what failure the system has detected. Some error messages could be related
to a hardware device. Others may indicate a problem with a device configuration. In some cases an error
message may include recommendations for troubleshooting or require that you press the Enter key to display
recommendations. Follow the instructions on the screen. It is recommended that you correct the error before
proceeding, even if the computer appears to boot successfully.
IMPORTANTIf your system fails after you make changes in the Setup menus, reboot the computer, enter
Setup again and load Setup defaults to correct the error.
66Packard Bell oneTwo M3350 / oneTwo M3351 / oneTwo L5350 / on eTwo L5351 Service Guide
Memory
MessageDescription
Gate20 ErrorThe BIOS is unable to properly control the mainboard’s Gate A20 function, which
controls access of memory over 1 MB. This may indicate a problem with the
mainboard.
Multi-Bit ECC ErrorThis message will only occur on systems using ECC enabled memory modules.
ECC memory has the ability to correct single-bit errors that may occur from faulty
memory modules.
A multiple bit corruption of memory has occurred, and the ECC memory algorithm
cannot correct it. This may indicate a defective memory module.
Parity ErrorFatal Memory Parity Error. System halts after displaying this message.
RAM R/W test failedThis message is displayed by the AMIBIOS8 when the RAM read/write test fails.
CMOS Memory Size
Wrong
The base memory (memory below 1MB) size that is reported in the CMOS (offset
15h) mismatches with the actual size detected. This condition may occur when the
hole is set at 512K base memory or when CMOS is corrupted.
Boot
MessageDescription
Boot Failure...This is a generic message indicating the BIOS could not boot from a particular
device. This message is usually followed by other information concerning the
device.
Invalid Boot DisketteA diskette was found in the drive, but it is not configured as a bootable diskette.
Drive Not ReadyThe BIOS was unable to access the drive because it indicated it was not ready for
data transfer. This is often reported by drives when no media is present.
A: Drive ErrorThe BIOS attempted to configure the A: drive during POST, but was unable to
properly configure the device. This may be due to a bad cable or faulty diskette
drive.
B: Drive ErrorThe BIOS attempted to configure the B: drive during POST, but was unable to
properly configure the device. This may be due to a bad cable or faulty diskette
drive.
Insert BOOT diskette
in A:
Reboot and select
proper boot device or
Insert boot media in
selected boot device
NO ROM BASICThis message occurs on some systems when no bootable device can be detected.
The BIOS attempted to boot from the A: drive, but could not find a proper boot
diskette.
Reboot and Select proper Boot device or Insert Boot Media in selected Boot device
BIOS could not find a bootable device in the system and/or removable media drive
does not contain media.
BIOS could not find a bootable device in the system and/or removable
media drive does not contain media.
Packard Bell oneTwo M3350 / oneTw o M3351 / oneTwo L5350 / oneTwo L5351 Service Guide67
Storage Device
MessageDescription
Primary Master Hard
Disk Error
Primary Slave Hard
Disk Error
Secondary Master
Hard Disk Error
Secondary Slave
Hard Disk Error
3rd Master Hard Disk
Error
3rd Slave Hard Disk
Error
4th Master Hard Disk
Error
4th Slave Hard Disk
Error
5th Master Hard Disk
Error
5th Slave Hard Disk
Error
6th Master Hard Disk
Error
6th Slave Hard Disk
Error
Primary Master Drive
- ATAPI Incompatible
Primary Slave Drive ATAPI Incompatible
Secondary Master
Drive - ATAPI
Incompatible
Secondary Slave
Drive - ATAPI
Incompatible
3rd Master Drive ATAPI Incompatible
The IDE/ATAPI device configured as Primary Master could not be properly
initialized by the BIOS. This message is typically displayed when the BIOS is trying
to detect and configure IDE/ATAPI devices in POST.
The IDE/A TAPI device configured as Primary Slave could not be properly initialized
by the BIOS. This message is typically displayed when the BIOS is trying to detect
and configure IDE/ATAPI devices in POST.
The IDE/ATAPI device configured as Secondary Master could not be properly
initialized by the BIOS. This message is typically displayed when the BIOS is trying
to detect and configure IDE/ATAPI devices in POST.
The IDE/ATAPI device configured as Secondary Slave could not be properly
initialized by the BIOS. This message is typically displayed when the BIOS is trying
to detect and configure IDE/ATAPI devices in POST.
The IDE/ATAPI device configured as Master in the 3rd IDE controller could not be
properly initialized by the BIOS. This message is typically displayed when the BIOS
is trying to detect and configure IDE/ATAPI devices in POST.
The IDE/ATAPI device configured as Slave in the 3rd IDE controller could not be
properly initialized by the BIOS. This message is typically displayed when the BIOS
is trying to detect and configure IDE/ATAPI devices in POST.
The IDE/ATAPI device configured as Master in the 4th IDE controller could not be
properly initialized by the BIOS. This message is typically displayed when the BIOS
is trying to detect and configure IDE/ATAPI devices in POST.
The IDE/ATAPI device configured as Slave in the 4th IDE controller could not be
properly initialized by the BIOS. This message is typically displayed when the BIOS
is trying to detect and configure IDE/ATAPI devices in POST.
The IDE/ATAPI device configured as Master in the 5th IDE controller could not be
properly initialized by the BIOS. This message is typically displayed when the BIOS
is trying to detect and configure IDE/ATAPI devices in POST.
The IDE/ATAPI device configured as Slave in the 5th IDE controller could not be
properly initialized by the BIOS. This message is typically displayed when the BIOS
is trying to detect and configure IDE/ATAPI devices in POST.
The IDE/ATAPI device configured as Master in the 6th IDE controller could not be
properly initialized by the BIOS. This message is typically displayed when the BIOS
is trying to detect and configure IDE/ATAPI devices in POST.
The IDE/ATAPI device configured as Slave in the 6th IDE controller could not be
properly initialized by the BIOS. This message is typically displayed when the BIOS
is trying to detect and configure IDE/ATAPI devices in POST.
The IDE/ATAPI device configured as Primary Master failed an ATAPI compatibility
test. This message is typically displayed when the BIOS is trying to detect and
configure IDE/ATAPI devices in POST.
The IDE/ATAPI device configured as Primary Slave failed an ATAPI compatibility
test. This message is typically displayed when the BIOS is trying to detect and
configure IDE/ATAPI devices in POST.
The IDE/ATAPI device configured as Secondary Master failed an ATAPI
compatibility test. This message is typically displayed when the BIOS is trying to
detect and configure IDE/ATAPI devices in POST.
The IDE/ATAPI device configured as Secondary Slave failed an AT API compatibility
test. This message is typically displayed when the BIOS is trying to detect and
configure IDE/ATAPI devices in POST.
The IDE/ATAPI device configured as Master in the 3rd IDE controller failed an
ATAPI compatibility test. This message is typically displayed when the BIOS is
trying to detect and configure IDE/ATAPI devices in POST.
68Packard Bell oneTwo M3350 / oneTwo M3351 / oneTwo L5350 / on eTwo L5351 Service Guide
MessageDescription
3rd Slave Drive ATAPI Incompatible
4th Master Drive ATAPI Incompatible
4th Slave Drive ATAPI Incompatible
5th Master Drive ATAPI Incompatible
5th Slave Drive ATAPI Incompatible
6th Master Drive ATAPI Incompatible
6th Slave Drive ATAPI Incompatible
S.M.A.R.T. Capable
but Command Failed
S.M.A.R.T.
Command Failed
S.M.A.R.T. Status
BAD, Backup and
Replace
S.M.A.R.T. Capable
and St at us BAD
The IDE/A TAPI device configured as Slave in the 3rd IDE controller failed an ATAPI
compatibility test. This message is typically displayed when the BIOS is trying to
detect and configure IDE/ATAPI devices in POST.
The IDE/ATAPI device configured as Master in the 4th IDE controller failed an
ATAPI compatibility test. This message is typically displayed when the BIOS is
trying to detect and configure IDE/ATAPI devices in POST.
The IDE/ATAPI device configured as Slave in the 4th IDE controller failed an ATAPI
compatibility test. This message is typically displayed when the BIOS is trying to
detect and configure IDE/ATAPI devices in POST.
The IDE/ATAPI device configured as Master in the 5th IDE controller failed an
ATAPI compatibility test. This message is typically displayed when the BIOS is
trying to detect and configure IDE/ATAPI devices in POST.
The IDE/ATAPI device configured as Slave in the 5th IDE controller failed an ATAPI
compatibility test. This message is typically displayed when the BIOS is trying to
detect and configure IDE/ATAPI devices in POST.
The IDE/ATAPI device configured as Master in the 6th IDE controller failed an
ATAPI compatibility test. This message is typically displayed when the BIOS is
trying to detect and configure IDE/ATAPI devices in POST.
The IDE/ATAPI device configured as Slave in the 6th IDE controller failed an ATAPI
compatibility test. This message is typically displayed when the BIOS is trying to
detect and configure IDE/ATAPI devices in POST.
The BIOS tried to send a S.M.A.R.T. message to a hard disk, but the command
transaction failed.
This message can be reported by an ATAPI device using the S.M.A.R.T. error
reporting standard. S.M.A.R.T. failure messages may indicate the need to replace
the hard disk.
The BIOS tried to send a S.M.A.R.T. message to a hard disk, but the command
transaction failed.
This message can be reported by an ATAPI device using the S.M.A.R.T. error
reporting standard. S.M.A.R.T. failure messages may indicate the need to replace
the hard disk.
A S.M.A.R.T. capable hard disk sends this message when it detects an imminent
failure.This message can be reported by an ATAPI device using the S.M.A.R.T.
error reporting standard. S.M.A.R.T. failure messages may indicate the need to
replace the hard disk.
A S.M.A.R.T. capable hard disk sends this message when it detects an imminent
failure.
This message can be reported by an ATAPI device using the S.M.A.R.T. error
reporting standard. S.M.A.R.T. failure messages may indicate the need to replace
the hard disk.
Packard Bell oneTwo M3350 / oneTw o M3351 / oneTwo L5350 / oneTwo L5351 Service Guide69
Virus-related
MessageDescription
BootSector Write!!The BIOS has detect ed software attempting to write to a d riv e’s boot sector . Th is i s
flagged as possible virus activity. This message will only be displayed if Virus
Detection is enabled in AMIBIOS setup.
VIRUS: Continue
(Y/N)?
If the BIOS detects possible virus activity, it will prompt the user. This message will
only be displayed if Virus Detection is enabled in AMIBIOS setup.
System Configuration
MessageDescription
DMA-1 ErrorError initializi ng primary DMA controller. This is a fatal error, often indication a
problem with system hardware.
DMA-2 ErrorError initializi ng secondary DMA controller. This is a fatal error, often indication a
problem with system hardware.
DMA Controller ErrorPOST error while trying to initialize the DMA controller. This is a fatal error, often
indication a problem with system hardware.
Checking NVRAM...
Update Failed
Microcode ErrorBIOS could not find or load the CPU Microcode Update to the CPU. This message
NVRAM Checksum
Bad, NVRAM
Cleared
Resource ConflictMore than one system device is trying to use the same non-shareable resources
NVRAM IgnoredThe NVRAM data used to store Plug’n’Play (PnP) data was not used for system
NVRAM BadThe NVRAM data used to store Plug’n’Play (PnP) data was not used for system
Static Resource
Conflict
PCI I/O conflictA PCI adapter generated an I/O resource conflict when configured by BIOS POST.
PCI ROM conflictA PCI adapter generated an I/O resource conflict when configured by BIOS POST.
PCI IRQ conflictA PCI adapter generated an I/O resource conflict when configured by BIOS POST.
PCI IRQ routing table
error
Timer ErrorIndicates an error while programming the count register of channel 2 of the 8254
Refresh timer test
failed
Interrupt Controller-1
error
Interrupt Controller-2
error
BIOS could not write to the NVRAM block. This message appears when the FLASH
part is write-protected or if there is no FLASH part (System uses a PROM or
EPROM).
only applies to INTEL CPUs. The message is most likely to appear when a brand
new CPU is installed in a mainboard with an outdated BIOS. In this case, the BIOS
must be updated to include the Microcode Update for the new CPU.
There was an error in while validating the NVRAM data. This causes POST to clear
the NVRAM data.
(Memory or I/O).
configuration in POST.
configuration in POST due to a data error.
Two or more Static Devices are trying to use the same resource space (usually
Memory or I/O).
BIOS POST (DIM code) found a PCI device in the system but was unable to figure
out how to route an IRQ to the device. Usually this error is causing by an
incomplete description of the PCI Interrupt Routing of the system.
timer. This may indicate a problem with system hardware.
BIOS POST found that the refresh timer hardware failed to pass the Refresh
Retrace Test.
BIOS POST could not initialize the Master Interrupt Controller. This may indicate a
problem with system hardware.
BIOS POST could not initialize the Slave Interrupt Controller. This may indicate a
problem with system hardware.
70Packard Bell oneTwo M3350 / oneTwo M3351 / oneTwo L5350 / on eTwo L5351 Service Guide
CMOS
Message DisplayedDescription
CMOS Date/Time Not
Set
CMOS Battery LowCMOS battery is low. This message usually indicates that the CMOS battery needs
CMOS Settings
Wrong
CMOS Checksum
Bad
The CMOS date and/or time are invalid. This error can be resol v ed by readjusting
the system time in AMIBIOS Setup.
to be replaced. It could also appear when the user intentionally discharges the
CMOS battery.
CMOS settings are invalid. This error can be resolved by using AMIBIOS Setup.
CMOS contents failed the Checksum check. Indicates that the CMOS data has
been changed by a program other than the BIOS or that the CMOS is not retaining
its data due to malfunction. This error can typically be resolved by using AMIBIOS
Setup.
Miscellaneous
Message DisplayedDescription
KBC BAT Test failedKeyboard controller BAT test failed. This may indicate a problem with keyboard
controller initialization.
Keyboard ErrorKeyboard is not present or the hardware is not responding when the keyboard
controller is initialized.
PS/2 Keyboard not
found
PS/2 Mouse not
found
Keyboard/Interface
Error
Unlock KeyboardPS/2 keyboard is locked. User needs to unlock the keyboard to continue the BIOS
System HaltedThe system has been halted. A reset or power cycle is required to reboot the
<INS> PressedIndicates that <INS> key is pressed during the BIOS POST . The POST will load and
Password check
failed
Unknown BIOS error.
Error code = 004Ah
Unknown BIOS error.
Error code = 004Bh
Floppy Controller
Failure
PS/2 keyboard support is enabled in the BIOS setup but the device is not detected.
PS/2 mouse support is enabled in the BIOS setup but the device is not detected.
Keyboard controller failure. This may indicate a problem with system hardware.
POST.
machine. This message appears after a fatal error has been detected.
use default CMOS settings.
The password entered does not match the password set in the setup. This condition
may occur for both Supervisor and User password verification.
This message is displayed when ADM module is not present in the AMIBIOS8
ROM.
This message is displayed when language module is not present in the AMIBIOS8
ROM.
Error in initializing legacy Floppy Controller.
Packard Bell oneTwo M3350 / oneTw o M3351 / oneTwo L5350 / oneTwo L5351 Service Guide71
Index of Symptom-to-FRU Error Messages
To use the information in this section to diagnose a problem:
1.Find the error symptom in the left column.
2.If directed to a check procedure, replace the FRU indicated in the check procedure.
If no check procedure is indicated, the first Action/FRU item listed in the right column is the most likely
cause.
NOTE If you cannot find a symptom or an error in this list and the problem remains, see “Undetermined
Problems” on page 65.
Processor/Processor Fan-related Symptoms
Symptom/ErrorAction/FRU
Processor fan does not run but power
supply fan runs.
Processor test failed.• Processor
NOTE Normally, the processor fan should be operative, and the processor clock setting should be exactly
set to match its speed requirement before diagnosing any processor problems.
• Ensure the system is not in power saving mode.
• With the system powered on, measure the voltage of the
processor fan connector. Its reading should be +12Vdc. If the
reading shows normal, but the fan still does not work, then
replace the heat sink fan.
• Mainboard
• Mainboard
Mainboard and Memory-related Symptoms
Symptom/ErrorAction/FRU
Memory test failed.• Memory module
• Mainboard
Incorrect memory size shown or repeated
during POST.
System works but fails to enter power
saving mode when the Power Management
Mode is set to Enabled.
Blinking cursor only; system does not work. • IDE drive connection/cables
NOTE Ensure the memory modules are installed properly and the contact leads are clean before
diagnosing any system problems.
• Insert the memory modules in the DIMM sockets properly,
then reboot the system.
• Memory module
• Mainboard
• Enter CMOS Setup and load the default settings. In Windows
systems, check settings in Power Management Property of
the Control Panel.
• Reload software from Recovery CD.
• IDE disk drives
• See “Undetermined Problems”.
• Mainboard
72Packard Bell oneTwo M3350 / oneTwo M3351 / oneTwo L5350 / on eTwo L5351 Service Guide
Hard Disk Drive-related Symptoms
Symptom/ErrorAction/FRU
Hard disk drive test failed.• Enter CMOS Setup and load the default settings.
• Hard disk drive cable
• Hard disk drive
• Mainboard
Hard disk drive cannot format completely.• Enter CMOS Setup and load the default settings.
• Hard disk drive cable
• Hard disk drive
• Mainboard
Hard disk drive has write error.• Enter CMOS Setup and load the default settings.
• Hard disk drive
Hard disk drive LED fails to light, but
system operates normally.
NOTE Make sure the hard disk drive is configured correctly in CMOS Setup and that cable/jumper are set
correctly before diagnosing any hard disk drive problems. (If only one drive is installed, please
make sure the drive is connected to master connector or the drive is set to master.)
Optical Disc Drive-related Symptoms
• With the system power on, measure the voltage of the HDD
LED connector.
• HDD LED cable
Symptom/ErrorAction/FRU
CD/DVD-ROM drive LED doesn't come on
but works normally.
CD/DVD-ROM drive LED flashes for more
than 30 seconds before LED shutting off.
Software asks to reinstall disc. Software
displays a reading CD/DVD error.
CD/DVD-ROM drive cannot load or eject
when the system is turned on and its eject
button is pressed and held.
CD/DVD-ROM drive does not read and
there are no messages are displayed.
CD/DVD-ROM drive can play audio CD but
no sound output.
• Enter CMOS Setup and load the default settings.
•DIMM
• Mainboard
• CD/DVD-ROM may have dirt or foreign material on it. Check
with a known good disc.
• CD/DVD-ROM is not inserted properly.
• CD/DVD-ROM is damaged.
• Disconnect all cables from CD/DVD-ROM drive except power
cable, then press the eject button to try to unload the disc.
• CD/DVD-ROM drive power cable
• CD/DVD-ROM drive
• CD may have dirt or foreign material on it. Check with a
known good disc.
• Ensure the CD/DVD-ROM driver is installed properly.
• CD/DVD-ROM drive.
• Ensure the headphone jack of the CD/DVD-ROM has an
output.
• Turn up the sound volume.
• Speaker power/connection/cable.
• CD/DVD-ROM drive.
NOTE Make sure the optical disc drive is configured correctly in CMOS Setup, the cable/jumper are set
correctly and the drive’s optical lens is clean before diagnosing any optical drive problems.
Packard Bell oneTwo M3350 / oneTw o M3351 / oneTwo L5350 / oneTwo L5351 Service Guide73
Real-Time Clock-related Symptoms
Symptom/ErrorAction/FRU
Real-time clock is inaccurate.• Ensure the information in the Standard CMOS Feature of
BIOS Setup is set correctly.
• RTC battery
• Mainboard
Audio-related Symptoms
Symptom/ErrorAction/FRU
Audio software program invoked but no
sound comes from speakers.
Modem-related Symptoms
Symptom/ErrorAction/FRU
Modem ring cannot wake up system from
suspend mode.
Data/fax modem software program invoked
but cannot receive/send data/fax
Fax/voice modem software program
invoked but has no sound output. (Data
files are received normally; voice from
modem cannot be produced, but system
sound feature works normally.)
• Speaker power/connection/cable
• For an external modem, make sure Power on By Ring in
BIOS Setup or Power Management is set to Enabled. For the
PCI modem, make sure Wake up by PCI card is set to
Enabled.
• If a PCI modem card is used, reinsert the modem card to the
PCI slot firmly or replace the modem card.
• In Win 98, ensure the telephone application is configured
correctly for your modem and set to receive messages and/or
fax.
• Ensure the modem card is installed properly.
• Ensure the modem voice-in cable from modem adapter card
is connected to the mainboard
Video and Monitor-related Symptoms
Symptom/ErrorAction/FRU
Video memory test failed.Video adapter
failed.
Display problem
• Incorrect colors
• No high intensity
• Missing, broken, or incorrect characters
• Blank monitor (dark)
• Blank monitor (bright)
• Distorted image
• Unreadable monitor
Display changing colors.• Monitor signal connection/cable
74Packard Bell oneTwo M3350 / oneTwo M3351 / oneTwo L5350 / on eTwo L5351 Service Guide
• Remove all non-factory-installed cards.
• Load default settings (if screen is readable).
• Mainboard
• Monitor signal connection/cable
• Monitor
• Video adapter card
• Mainboard
• Video adapter card
• Mainboard
Printer-related Symptoms
Symptom/ErrorAction/FRU
Printing failed.• Ensure the printer driver is properly installed. Refer to the
printer service manual.
• Printer
• Printer cable
• Mainboard.
Printer problems.• Refer to the service manual for the printer.
Keyboard-related Symptoms
Symptom/ErrorAction/FRU
Some or all keys on keyboard do not work. • Keyboard
Power Supply-related Symptoms
Symptom/ErrorAction/FRU
Pressing the power button does not turn off
the system. (Only unplugging the power
cord from electrical outlet can turn off the
system.)
Pressing the power button does not turn on
the system
Executing software shutdown from
Windows98 Start menu does not turn off the
system. (Only pressing power button can
turn off the system).
No system power, or power supply fan is
not running.
• Ensure the Soft-off by PWR-BTTN in CMOS Setup (under
Power Management) is not set to Instant-off.
• Power switch cable assembly
• Power switch cable assembly.
• Enter CMOS Setup and load the default settings.
• Reload software from Recovery CD.
• Power supply
• Mainboard
Packard Bell oneTwo M3350 / oneTw o M3351 / oneTwo L5350 / oneTwo L5351 Service Guide75
Beep Codes
When no error message is displayed but the computer stops during POST, listen for beep codes.
BeepStatusPossible Causes
One short beep.System readySystem is OK.
Continuous one
long beep
One long beep, then
two short beeps and
repeat
One long beep, then
one short beep
Two short beeps.CMOS failureCMOS checksum error
Undetermined Problems
NOTE • Verify that all attached devices are supported by the computer.
• Verify that the power supply being used at the time of the failure is operating correctly. (See
“Power System Check” on page 61)
Memory not installed or
memory error
VGA not installed or
VGA error
BIOS failureBIOS damaged. Processor jump to boot block to execute
• Something is wrong with the memory installed
• There is problem accessing the memory (i.e., mainboard
problem)
• The mainboard can not access the video card for some
reasons. Either the video card is not working, its memory
is not accessible, or its BIOS may be corrupt.
• Something is wrong with the mainboard.
the default procedure.
Follow the procedures below to isolate the failing FRU. Do not isolate non-defective FRU.
1.Power off the computer .
2.Visually check them for damage. If any problems are found, replace the FRU.
3.Remove or disconnect all of the following devices:
•Non-Acer devices
•Printer, mouse, and other external devices
•Hard disk drive
•DIMM
•CD/DVD-ROM drive
•Expansion boards
4.Power on the computer.
5.Determine if the problem has been resolved.
6.If the problem does not recur, reconnect the removed devices one at a time until you find the failed FRU.
If the problem persists, replace the mainboard, and then LCD assembly (one at a time). Do not replace a
non-defective FRU.
76Packard Bell oneTwo M3350 / oneTwo M3351 / oneTwo L5350 / on eTwo L5351 Service Guide
BIOS Recovery
When you boot up the computer and you hear one long beep, followed by a shorter one, the system BIOS is
damaged. This maybe cause by an interruption during a BIOS flash procedure (e.g. a power outage) or a
corrupted BIOS code, which will cause the system to go into an unbootable state.You need to access and
execute the boot block program to reboot the computer and recover the regular BIOS code.
Note the following when restoring the BIOS settings:
•Make sure the computer is connected to a UPS unit during the BIOS recovery process.
•The BIOS crisis recovery disk should be prepared in a computer running the Windows XP or Wind ows
Vista OS.
Creating the BIOS Crisis Recovery Disk
1.Prepare a removable USB storage device with a capacity size greater than 10 MB.
Note that all data on the USB storage device will be cleared during the creation of the crisis disk.
2.Set up a computer running the Windows XP or Windows Vista operating system and plug in the USB
storage device into an available USB port.
3.Copy the target BIOS ROM file to the USB storage device and rename it as “amiboot.rom”.
4.Unplug the USB storage device.
5.Eject the removable USB storage device from the computer.
Performing a BIOS Recovery
1.Shut down the BIOS failed-computer.
2.Connect the USB storage device containing the “amiboot.rom” file to the failed computer.
3.Press the power button to turn on the computer.
The system will now execute the BIOS recovery process. When the process is complete, four short beeps
will be emitted and the computer will automatically reboot.
4.Disconnect the USB storage device from the computer.
5.Press Delete to run the CMOS Setup Utility.
6.Press F9 to load the system default settings.
7.Select Ok, then press Enter.
8.Press F9 to save the default settings and close the Setup utility.
9.Select Ok, then press Enter.
Packard Bell oneTwo M3350 / oneTw o M3351 / oneTwo L5350 / oneTwo L5351 Service Guide77
Clearing CMOS
You may need to clear the Setup configuration values (CMOS) if the configuration has been corrupted, or if
incorrect settings made in the Setup Utility caused error messages to be unreadable. This procedure will clear
the BIOS supervisor password as well.
Use the JBIOS1 jumper to clear the CMOS data.
•1-2 position: Normal operation (default)
•2-3 position: Clear CMOS data
To clear the CMOS data:
1.Turn off the power to the computer and all peripherals.
2.Unplug the power cord from the computer.
3.Unplug the network cable and all connected peripheral devices from the computer.
4.Place the computer on a flat, steady surface with the rear cover facing upward.
5.Reinstall the rear cover by following the procedure described on page 28.
6.Remove the wall mount plate by following the procedure described on page 35.
7.Remove the graphics card by following the procedure described on page 37
8.Remove the hard drive by following the procedure described on page 40.
9.If necessary, remove any other assemblies or cables that prevent access to the CMOS clear jumper.
10. Locate the JBIOS1 jumper on the mainboard.
11. Remove the jumper block and set it over the 2-3 pins for 20 to 30 seconds.
12. Return the jumper block to its default 1-2 position.
13. Reinstall the hard drive, graphics card, and the wall mount plate.
14. Reinstall any any other assemblies or cables that have previously been removed.
15. Reinstall the rear cover and the computer stand.
16. Connect the AC power cord to the system.
17. Press the power button to turn on the computer.
18. During POST, press Delete to access the Setup Utility.
19. Press F9 to load the system default values.
20. Press F10 to save the changes you made and close the Setup Utility.
78Packard Bell oneTwo M3350 / oneTwo M3351 / oneTwo L5350 / on eTwo L5351 Service Guide
Chapter 5
System Architecture
This chapter shows the block diagram and board layout of the Packard Bell oneTwo M3350 / oneTwo M3351 /
oneTwo L5350 / oneTwo L5351 computer. Procedure for using the G116 hardware gap to clear the BIOS
password is also shown.
Block Diagram
The core subsystems of the Packard Bell oneTwo M3350 / oneTwo M3351 / oneTwo L5350 / oneTwo L5351
computer are depicted in the following block diagram.
Packard Bell oneTwo M3350 / oneTw o M3351 / oneTwo L5350 / oneTwo L5351 Service Guide79
Mainboard Layout
This section shows the major mainboard components.
Top: Line-in, line-out, and microphone jacks
Bottom: Line-in and line-out jacks
Right: USB ports
Right: eSATA port
80Packard Bell oneTwo M3350 / oneTwo M3351 / oneTwo L5350 / on eTwo L5351 Service Guide
ItemCodeComponent
15HDMI1HDMI port
16KBMSCONN1 Left: PS/2 mouse port
17PWR14-pin ATX power connector
18U9Processor socket
19nVIDIA GeForce 8200 (MCP78PV) chipset
20CPUFAN1Heat sink fan cable connector
21DIMM1DDR3 slot 1
22DIMM2DDR3 slot 2
23DIMM3DDR3 slot 3
24DIMM4DDR3 slot 4
25PWR224-pin ATX power connector
26BT1RTC batte ry
27U22SIO ITE 8720 controller
28SATA3ODD SATA cable connector
29BZ1Internal buzzer
30SATA1HDD SATA cable connector
Right: PS/2 keyboard port
Packard Bell oneTwo M3350 / oneTw o M3351 / oneTwo L5350 / oneTwo L5351 Service Guide81
82Packard Bell oneTwo M3350 / oneTwo M3351 / oneTwo L5350 / on eTwo L5351 Service Guide
Chapter 6
Field Replaceable Unit (FRU) List
This chapter gives you the FRU (Field Replaceable Unit) listing of the Packard Bell oneTwo M3350 / oneTwo
M3351 / oneTwo L5350 / oneTw o L5351 computer global configurations. Refer to this list when ordering for
repair parts or for RMA (Return Merchandise Authorization).
IMPORTANTPart number changes will not be noted in this printed Service Guide. The part numbers listed
in this Service Guide may differ from those given to regional AUTHORIZED SERVICE
PROVIDERS. You MUST use the local FRU list provided by your regional office to order
FRU parts for repair and service of customer machines. Make sure that you are using the
most up-to-date information available on your regional web site or channel when ordering
FRU parts.
NOTE Follow the local government regulations, or the rules set by your regional office on how to return or
dispose of defective parts.
Packard Bell oneTwo M3350 / oneTw o M3351 / oneTwo L5350 / oneTwo L5351 Service Guide83
Exploded Diagram
No.ComponentNo.Component
1Speaker mesh plate10Computer stand
2Front bezel11Computer stand shells
3Front bezel frame12Inverter board cover
4Webcam m o du l e13USB/audio board cover
5Main chassis14Power button holder
6Mainboard15Power button knob
7Wall mount plate16Capacitive LED board cover
8Rear cover17Light bar guide
9I/O cable cover18Light bar cover
84Packard Bell oneTwo M3350 / oneTwo M3351 / oneTwo L5350 / on eTwo L5351 Service Guide
FRU List
System Model: ACER_ONE TWO L5351_PGREENWOOD (No: 91.3CX01.A10G)
CategoryPart NamePart Number
Boards
Mainboard
MAINBOARD DA078L/ABOXER2 EUP W/RTC BA TTER Y W/O
1394 LF DDRIII 4 DIMM & CPU & MEMORY