104 Chapter 4Index of Symptom-to-FRU Error MessageLCD-Related SymptomsSymptom / Error Action in SequenceLCD backlight doesn't workLCD is too darkLCD brightness cannot be adjustedLCD contrast cannot be adjustedEnter 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 IDLCD cableLCD inverterLCDMainboardUnreadable LCD screenMissing pels in charactersAbnormal screenWrong color displayedReconnect the LCD connectorLCD inverter IDLCD cableLCD inverterLCDMainboardLCD has extra horizontal or vertical linesdisplayed.LCD inverter IDLCD inverterLCD cableLCDMainboardIndicator-Related SymptomsSymptom / Error Action in SequenceIndicator incorrectly remains off or on, butsystem runs correctlyReconnect the inverter boardInverter boardMainboardPower-Related SymptomsSymptom / Error Action in SequencePower shuts down during operation Power source (battery pack and power adapter). See “PowerSystem Check” on page 95.Battery packPower adapterHard disc drive & battery connection boardMainboardThe system doesn’t power-on. Power source (battery pack and power adapter). See “PowerSystem Check” on page 95.Battery packPower adapterHard disc drive & battery connection boardMainboard
