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Chapter 4 73
No-Beep Symptoms
Symptom / Error Action in Sequence
No beep, power-on indicator turns off and LCD is
blank.
Power source (battery pack and power adapter).
Power System Check.
Ensure every connector is connected tightly and
correctly.
Reconnect the DIMM.
CPU board
System board.
No beep, power-on indicator turns on and LCD is
blank.
Power source (battery pack and power adapter).
Power System Check.
Reconnect the LCD connectors
Hard disk drive
LCD inverter ID
LCD cable
Inverter
LCD
System board
No beep, power-on indicator turns on and LCD is
blank. But you can see POST on an external CRT.
Reconnect the LCD connectors.
LCD inverter ID
LCD cable
LCD inverter
LCD
System board
No beep, power-on indicator turns on and a blinking
cursor shown on LCD during POST.
Ensure every connector is connected tightly and
correctly.
System board
No beep during POST but system runs correctly. Speaker
Audio board
System board