Chapter 4 107Index 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'twork).LCD inverter IDLCD cableLCD inverterLCDSystem boardUnreadable LCD screenMissing pels in charactersAbnormal screenWrong color displayedReconnect the LCD connectorLCD inverter IDLCD cableLCD inverterLCDSystem boardLCD has extra horizontal or vertical linesdisplayed.LCD inverter IDLCD inverterLCD cableLCDSystem boardIndicator-Related SymptomsSymptom / Error Action in SequenceIndicator incorrectly remains off or on, butsystem runs correctlyReconnect the inverter boardInverter boardSystem boardPower-Related SymptomsSymptom / Error Action in SequencePower shuts down during operation Power source (battery pack and power adapter). See “PowerSystem Check” on page 97.Battery packPower adapterHard drive & battery connection boardSystem boardThe system doesn’t power-on. Power source (battery pack and power adapter). See “PowerSystem Check” on page 97.Battery packPower adapterHard drive & battery connection boardSystem board
