Chapter 4 77Index of Symptom-to-FRU Error MessageNOTE: If the symptom or error for your problem condition is not listed in this section, refer to the“Undetermined Problems” section on page 81.LCD-related SymptomsPower-related SymptomsSymptom/Error Action in SequenceLCD backlight doesn't workLCD is too darkLCD brightness cannot be adjustedLCD contrast cannot be adjustedRun the Setup Utility, then press F9 to load the systemdefaults.Reconnect the LCD-CCD cable.Keyboard (if contrast and brightness function key doesn'twork).LCD-CCD cableInverter boardLCD panelSystem boardUnreadable LCD screenMissing pels in charactersAbnormal screenWrong color displayedReconnect the LCD-CCD cable.LCD cableInverter boardLCD panelSystem boardLCD has extra horizontal or vertical linesdisplayed.Inverter boardLCD-CCD cableLCD panelSystem boardSymptom/Error Action in SequencePower shuts down during operation Power source (battery pack and power adapter). Refer to the“Power System Check” section on page 67.Battery packPower adapterSystem boardThe system won’t power on. Power source (battery pack and power adapter). Refer to the“Power System Check” section on page 67.Battery packPower adapterSystem boardThe system won’t power off. Power source (battery pack and power adapter). Refer to the“Power System Check” section on page 67.Hold and press the power button for more than four seconds.System boardBattery won’t charged Refer to the “Check the Battery Pack” section on page 67.Battery packSystem board
