Chapter 4 78Index of Symptom-to-FRU Error MessagesLCD-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 Defaults” on Exitscreen, then reboot system.Reconnect the LCD connectors.Keyboard (if contrast and brightness function key doesn'twork).LCD cableLCD inverterLCDMain boardUnreadable LCD screenMissing pels in charactersAbnormal screenWrong color displayedReconnect the LCD connectorLCD cableLCD inverterLCDMain boardLCD has extra horizontal or vertical linesdisplayed.LCD inverterLCD cableLCDMain boardIndicator-Related SymptomsSymptom / Error Action in SequenceIndicator incorrectly remains off or on, butsystem runs correctlyReconnect the inverter boardInverter boardMain boardPower-Related SymptomsSymptom / Error Action in SequencePower shuts down during operation Power source (battery pack and power adapter). See “PowerSystem Check” .Battery packPower adapterHard drive & battery connection boardMain boardThe system doesn’t power-on. Power source (battery pack and power adapter). See “PowerSystem Check” .Battery packPower adapterHard drive & battery connection boardMain boardThe system doesn’t power-off. Power source (battery pack and power adapter). See “PowerSystem Check” .Hold and press the power switch for more than 4 seconds.Main boardBattery can’t be charged See “Check the Power Adapter”.Battery packMain board
