Symptom or error
FRU or action in sequence
No beep power-on indicator on and a
blank LCD during POST. System board.
v LCD backlight not working.
v LCD too dark.
v LCD brightness cannot be adjusted.
v LCD contrast cannot be adjusted. 1. Reseat the LCD connectors.
2. LCD assembly.
3. System board.
v LCD screen unreadable.
v Characters missing pixels.
v Screen abnormal.
v Wrong color displayed. 1. See important note for “LCD-related
symptoms.”
2. Reseat all LCD connectors.
3. LCD assembly.
4. System board.
Horizontal o r vertical lines displayed on
LCD. LCD assembly.