Touchpad Check

Advance Technical Repair of Laptops Motherboard

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If the touchpad doesn't work, do the following actions one at a time to correct the problem. Do not replace a non-defective FRU:

  1. Reconnect the touchpad cables.
  2. Replace the touchpad.
  3. Replace the system board.

After you use the touchpad, the pointer drifts on the screen for a short time. This self-acting pointer movement can occur when a slight, steady pressure is applied to the touchpad pointer. This symptom is not a hardware problem. No service actions are necessary if the pointer movement stops in a short period of time.

The POST error message index lists the error message and their possible causes. The most likely cause is listed first.

NOTE: Perform the FRU replacement or actions in the sequence shown in FRU/Action column, if the FRU replacement does not solve the problem, put the original part back in the computer. Do not replace a non-defective FRU.

This index can also help you determine the next possible FRU to be replaced when servicing a computer.

If the symptom is not listed, see "Undetermined Problems" on page 107.

The following lists the error messages that the BIOS displays on the screen and the error symptoms classified by function.

NOTE: Most of the error messages occur during POST. Some of them display information about a hardware device, e.g., the amount of memory installed. Others may indicate a problem with a device, such as the way it has been configured.

NOTE: If the system fails after you make changes in the BIOS Setup Utility menus, reset the computer, enter Setup and install Setup defaults or correct the error.

Error Code List

Error Codes

Error Messages

006

Equipment Configuration Error Causes:

  1. CPU BIOS Update Code Mismatch
  2. IDE Primary Channel Master Drive Error

(THe causes will be shown before "Equipment Configuration Error")

010

Memory Error at xxxx:xxxx:xxxxh (R:xxxxh, W:xxxxh)

070

Real Time Clock Error

071

CMOS Battery Bad

072

CMOS Checksum Error

Incorrect password is specified.

<No error code>

Battery critical LOW

In this situation BIOS will issue 4 short beeps then shut down system, no message will show.

<No error code>

Thermal critical High

In this situation BIOS will shut down system, not show message.

Error Message List

Error Messages

FRU/Action in Sequence

Failure Fixed Disk

Reconnect hard disk drive connector. "Load Default Settings" in BIOS Setup Utility. Hard disk drive System board

Stuck Key

see "Keyboard or Auxiliary Input Device Check" on page 95.

Keyboard error

see "Keyboard or Auxiliary Input Device Check" on page 95.

Keyboard Controller Failed

see "Keyboard or Auxiliary Input Device Check" on page 95.

Keyboard locked - Unlock key switch

Unlock external keyboard

Monitor type does not match CMOS - Run Setup

Run "Load Default Settings" in BIOS Setup Utility.

Shadow RAM Failed at offset: nnnn

BIOS ROM System board

System RAM Failed at offset: nnnn

DIMM

System board

Extended RAM Failed at offset: nnnn

DIMM

System board

System battery is dead - Replace and run Setup

Replace RTC battery and Run BIOS Setup Utility to reconfigure system time, then reboot system.

System CMOS checksum bad - Default configuration used

RTC battery

Run BIOS Setup Utility to reconfigure system time, then reboot system.

Run BIOS Setup Utility to reconfigure system time, then reboot system.

System board

Error Messages

FRU/Action in Sequence

Run BIOS Setup Utility to reconfigure system time, then reboot system.

System board

Previous boot incomplete - Default configuration used

Run "Load Default Settings" in BIOS Setup Utility. RTC battery System board

Memory size found by POST differed from CMOS

Run "Load Default Settings" in BIOS Setup Utility. DIMM

System board

Diskette drive A error

Check the drive is defined with the proper diskette type in BIOS Setup Utility

See "External Diskette Drive Check" on page 95.

Incorrect Drive A type - run SETUP

Check the drive is defined with the proper diskette type in BIOS Setup Utility

System cache error - Cache disabled

System board

CPU ID:

System board

System board

System board

System board

Device Address Conflict

Run "Load Default Settings" in BIOS Setup Utility. RTC battery System board

Allocation Error for device

Run "Load Default Settings" in BIOS Setup Utility. RTC battery System board

Failing Bits: nnnn

DIMM BIOS ROM System board

Fixed Disk n

None

Invalid System Configuration Data

BIOS ROM System board

I/O device IRQ conflict

Run "Load Default Settings" in BIOS Setup Utility. RTC battery System board

Operating system not found

Enter Setup and see if fixed disk and drive A: are properly identified. Diskette drive Hard disk drive System board

No beep Error Messages

FRU/Action in Sequence

No beep, power-on indicator turns off and LCD is blank.

Power source (battery pack and power adapter). See "Power System Check" on page 96.

Ensure every connector is connected tightly and correctly. Reconnect the DIMM. LED board. System board.

No beep, power-on indicator turns on and LCD is blank.

Power source (battery pack and power adapter). See "Power

System Check" on page 96.

Reconnect the LCD connector

Hard disk drive

LCD inverter ID

LCD cable

LCD Inverter

System board

No beep, power-on indicator turns on and LCD is blank. But you can see POST on an external CRT.

Reconnect the LCD connectors.

LCD inverter ID

LCD cable

LCD inverter

System board

No beep, power-on indicator turns on and a blinking cursor shown on LCD during POST.

Ensure every connector is connected tightly and correctly. System board

No beep during POST but system runs correctly.

Speaker System board

LCD-Related Symptoms

Symptom / Error

Action in Sequence

LCD backlight doesn't work LCD is too dark

LCD brightness cannot be adjusted LCD contrast cannot be adjusted

Enter BIOS Utility to execute "Load Setup Default Settings", then reboot system.

Reconnect the LCD connectors.

Keyboard (if contrast and brightness function key doesn't work).

LCD inverter ID

LCD cable

LCD inverter

System board

Unreadable LCD screen Missing pels in characters Abnormal screen Wrong color displayed

Reconnect the LCD connector

LCD inverter ID

LCD cable

LCD inverter

System board

LCD has extra horizontal or vertical lines displayed.

LCD inverter ID LCD inverter LCD cable LCD

System board

Indicator-Related Symptoms

Symptom / Error

Action in Sequence

Indicator incorrectly remains off or on, but system runs correctly

Reconnect the inverter board Inverter board System board

Power-Related Symptoms

Symptom / Error

Action in Sequence

Power shuts down during operation

Power source (battery pack and power adapter). See "Power System Check" on page 96. Battery pack Power adapter

Hard drive & battery connection board System board

The system doesn't power-on.

Power source (battery pack and power adapter). See "Power System Check" on page 96. Battery pack Power adapter

Hard drive & battery connection board System board

The system doesn't power-off.

Power source (battery pack and power adapter). See "Power System Check" on page 96.

Hold and press the power switch for more than 4 seconds. System board

Battery can't be charged

See "Check the Battery Pack" on page 98. Battery pack System board

PCMCIA-Related Symptoms

Symptom / Error

Action in Sequence

System cannot detect the PC Card (PCMCIA)

PCMCIA slot assembly System board

PCMCIA slot pin is damaged.

PCMCIA slot assembly

Memory-Related Symptoms

Symptom / Error

Action in Sequence

Memory count (size) appears different from actual size.

Enter BIOS Setup Utility to execute "Load Default Settings, then reboot system.

DIMM

System board

Speaker-Related Symptoms

Symptom / Error

Action in Sequence

In Windows, multimedia programs, no sound comes from the computer.

Audio driver Speaker System board

Internal speakers make noise or emit no sound.

Speaker System board

Power Management-Related Symptoms

Symptom / Error

Action in Sequence

The system will not enter hibernation

Keyboard (if control is from the keyboard) Hard disk drive System board

The system doesn't enter hibernation mode and four short beeps every minute.

See "Hibernation Mode" on page 29.

Press Fn+Oand see if the computer enters hibernation mode.

Touchpad

Keyboard

Hard disk connection board Hard disk drive System board

The system doesn't enter standby mode after closing the LCD

See "Hibernation Mode" on page 29. LCD cover switch System board

The system doesn't resume from hibernation mode.

See "Hibernation Mode" on page 29. Hard disk connection board Hard disk drive System board

The system doesn't resume from standby mode after opening the LCD.

See "Hibernation Mode" on page 29. LCD cover switch System board

Battery fuel gauge in Windows doesn't go higher than 90%.

Remove battery pack and let it cool for 2 hours.

Refresh battery (continue use battery until power off, then charge battery).

Battery pack

System board

Power Management-Related Symptoms

Symptom / Error

Action in Sequence

System hangs intermittently.

Reconnect hard disk/CD-ROM drives. Hard disk connection board System board

Peripheral-Related Symptoms

Symptom / Error

Action in Sequence

System configuration does not match the installed devices.

Enter BIOS Setup Utility to execute "Load Default Settings", then reboot system.

Reconnect hard disk/CD-ROM/diskette drives.

External display does not work correctly.

Press Fn+F5, LCD/CRT/Both display switching System board

USB does not work correctly

System board

Print problems.

Ensure the "Parallel Port" in the "Onboard Devices Configuration" of

BIOS Setup Utility is set to Enabled.

Onboard Devices Configuration

Run printer self-test.

Printer driver

Printer cable

Printer

System Board

Serial or parallel port device problems.

Ensure the "Serial Port" in the Devices Configuration" of BIOS Setup

Utility is set to Enabled.

Device driver

Device cable

Device

System board

Keyboard/Touchpad-Related Symptoms

Symptom / Error

Action in Sequence

Keyboard (one or more keys) does not work.

Reconnect the keyboard cable.

Keyboard

System board

Touchpad does not work.

Reconnect touchpad cable. Touchpad board System board

Modem-Related Symptoms

Symptom / Error

Action in Sequence

Internal modem does not work correctly.

Modem phone port modem combo board System board

NOTE: If you cannot find a symptom or an error in this list and the problem remains, see "Undetermined Problems" on page 107.

NOTE: If you cannot find a symptom or an error in this list and the problem remains, see "Undetermined Problems" on page 107.

Intermittent system hang problems can be caused by a variety of reasons that have nothing to do with a hardware defect, such as: cosmic radiation, electrostatic discharge, or software errors. FRU replacement should be considered only when a recurring problem exists.

When analyzing an intermittent problem, do the following:

  1. Run the advanced diagnostic test for the system board in loop mode at least 10 times.
  2. If no error is detected, do not replace any FRU.
  3. If any error is detected, replace the FRU. Rerun the test to verify that there are no more errors.

The diagnostic problems does not identify which adapter or device failed, which installed devices are incorrect, whether a short circuit is suspected, or whether the system is inoperative.

Follow these procedures to isolate the failing FRU (do not isolate non-defective FRU).

NOTE: Verify that all attached devices are supported by the computer.

NOTE: Verify that the power supply being used at the time of the failure is operating correctly. (See "Power System Check" on page 96):

  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
  • Battery pack
  • Hard disk drive

□ DIMM

  • CD-ROM/Diskette drive Module
  • PC Cards
  1. Power-on the computer.
  2. Determine if the problem has changed.
  3. If the problem does not recur, reconnect the removed devices one at a time until you find the failing FRU.
  4. If the problem remains, replace the following FRU one at a time. Do not replace a non-defective FRU:
  • System board
  • LCD assembly

Jumper and Connector Locations

Chapter 5

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