Index of SymptomtoFRU Error Message

LCD-Related Symptoms

Symptom / Error

Check or do the following in sequence

LCD backlight doesn't work LCD is too dark

LCD brightness cannot be adjusted LCD contrast cannot be adjusted

  • Run "Load Setup Defaults" in BIOS Setup Utility, then reboot system.
  • Reconnect the LCD connectors.
  • Keyboard (if contrast and brightness function key doesn't work).
  • LCD inverter ID
  • LCD cable
  • LCD inverter

Mainboard

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

  • Reconnect the LCD connector
  • LCD inverter ID
  • LCD cable
  • LCD inverter

□ Mainboard

LCD has extra horizontal or vertical lines displayed.

  • LCD inverter ID
  • LCD inverter
  • LCD cable

□ Mainboard

Indicator-Related Symptoms

Symptom / Error

Check or do the following in sequence

Indicator incorrectly remains off or on, but system runs correctly

  • Reconnect the inverter board.
  • Mainboard

Power-Related Symptoms

Symptom / Error

Check or do the following in sequence

Power shuts down during operation

  • Power source (battery pack and power adapter). See "Power System Check" on page 93.
  • Battery pack
  • Power adapter
  • Hard disk drive & battery connection board
  • Mainboard

The system doesn't power-on.

  • Power source (battery pack and power adapter). See "Power System Check" on page 93.
  • Battery pack
  • Power adapter
  • Hard disk drive & battery connection board
  • Mainboard

Symptom / Error

Check or do the following in sequence

The system doesn't power-off.

  • Power source (battery pack and power adapter). See "Power System Check" on page 93.
  • Hold and press the power switch for more than 4 seconds.
  • Mainboard

Battery can't be charged

  • See "Check the Battery Pack" on page 93.
  • Battery pack
  • Mainboard

PCMCIA-Related Symptoms

Symptom / Error

Check or do the following in sequence

System cannot detect the PC Card (PCMCIA)

  • PCMCIA slot assembly
  • Mainboard

PCMCIA slot pin is damaged.

PCMCIA slot assembly

Memory-Related Symptoms

Symptom / Error

Check or do the following in sequence

Memory count (size) appears different from actual size.

□ Run "Load Setup Defaults" in BIOS Setup Utility, then reboot system.

□ Mainboard

Speaker-Related Symptoms

Symptom / Error

Check or do the following in sequence

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

  • Audio driver
  • Speaker
  • Mainboard

Internal speakers make noise or emit no sound.

  • Speaker
  • Mainboard

Power Management-Related Symptoms

Symptom / Error

Check or do the following in sequence

The system will not enter hibernation

  • See "Save to Disk (S4)" on page 44.
  • Keyboard (if control is from the keyboard)
  • Hard disk drive
  • Mainboard

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

  • Press Fn+o and see if the computer enters hibernation mode.
  • Touchpad
  • Keyboard
  • Hard disk connection board
  • Hard disk drive
  • Mainboard

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

  • See "Save to Disk (S4)" on page 44.
  • LCD cover switch
  • Mainboard

Symptom / Error

Check or do the following in sequence

The system doesn't resume from hibernation mode.

  • See "Save to Disk (S4)" on page 44.
  • Hard disk connection board
  • Hard disk drive
  • Mainboard

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

  • See "Save to Disk (S4)" on page 44.
  • LCD cover switch
  • Mainboard

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
  • Mainboard

System hangs intermittently.

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

Peripheral-Related Symptoms

Symptom / Error

Check or do the following in sequence

System configuration does not match the installed devices.

  • Run "Load Setup Defaults" in BIOS Setup Utility, then reboot system.
  • Reconnect hard disk/CD-ROM/diskette drives.

External display does not work correctly.

  • Press Fn+F5 to switch to LCD or CRT
  • Mainboard

USB does not work correctly

□ Mainboard

Print problems.

  • Run printer self-test.
  • Printer driver
  • Printer cable
  • Printer
  • Mainboard

Keyboard/Touchpad-Related Symptoms

Symptom / Error

Check or do the following in sequence

Keyboard (one or more keys) does not work.

  • Reconnect the keyboard cable.
  • Keyboard
  • Mainboard

Touchpad does not work.

  • Reconnect touchpad cable.
  • Touchpad board
  • Mainboard

Symptom / Error

Check or do the following in sequence

Internal modem does not work correctly.

  • Modem phone port
  • Modem combo board
  • Mainboard

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.

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Responses

  • samuele mancini
    How to check if hard disk drives are powered on and properly on acer extensa 4220?
    8 years ago

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