Filter
Top Products
92 Troubleshooting
Power-on indicator on, and
a blank LCD not POST
1. Ensure every connection is correct.
2. DIMM
3. Reseat IMM (CPU board)
4. IMM (CPU board)
5. System board
Power-on indicator not on,
and a blank LCD during
POST
1. Reseat LCD connectors.
2. LCD inverter ID
3. LCD FPC cable
4. LCD inverter
5. LCD
6. LED board
7. System board
Power-on indicator on, and
a blank LCD during POST.
1. Reseat the LCD connectors.
2. LCD inverter ID
3. LCD FPC Cable
4. LCD inverter
5. LCD
6. System board
• LCD backlight not working
• LCD too dark
• LCD brightness can not be
adjusted
• LCD contrast cannot be
adjusted
1. Reseat the LCD connectors.
2. Keyboard (if control is from the keyboard)
3. LCD inverter ID
4. LCD FPC Cable
5. LCD inverter
6. LCD
7. System board
• LCD screen unreadable
• Characters missing pels
• Screen abnormal
• Wrong color displayed
1. Reseat the LCD connectors.
2. LCD inverter ID
3. LCD FPC Cable
4. LCD inverter
5. LCD
6. System board
LCD has extra horizontal or
vertical lines displayed.
1. LCD inverter ID
2. LCD inverter
3. LCD FPC Cable
4. LCD
5. System board
Keyboard (one or more keys)
does not work.
1. Reseat the keyboard cable.
2. Keyboard
3. System board
TouchPad does not work. 1. Reseat TouchPad cable.
2. TouchPad board
3. System board
Symptom / Error FRU / Action in Sequence
720.book Page 92 Saturday, March 6, 1999 10:00 AM