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Chapter 4 4-11
No beep, 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. Main board
No beep, 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. Main board
No beep during POST but
system runs correctly.
1. Speaker
LCD-Related Symptoms
Symptom / Error Spare Part / Action in Sequence
•
LCD backlight not working
•
LCD too dark
•
LCD brightness can not be
adjusted
•
LCD contrast cannot be
adjusted
1. Reseat the LCD connector
2. Keyboard (if control is from the keyboard)
3. LCD inverter ID
4. LCD FPC Cable
5. LCD inverter
6. LCD
7. Main board
•
LCD screen unreadable
•
Characters missing pels
•
Screen abnormal
•
Wrong color displayed
1. Reseat the LCD connector
2. LCD inverter ID
3. LCD FPC Cable
4. LCD inverter
5. LCD
6. Main board
LCD has extra horizontal or
vertical lines displayed.
1. LCD inverter ID
2. LCD inverter
3. LCD FPC Cable
4. LCD
5. Main board
Keyboard/TouchPad-Related Symptoms
Symptom / Error Spare Part / Action in Sequence
Keyboard (one or more keys)
does not work.
1. Reseat the keyboard cable.
2. Keyboard
3. Main board
TouchPad does not work. 1. Reseat TouchPad cable.
2. TouchPad board
3. Main board
No Beep Symptoms
Symptom / Error Spare Part / Action in Sequence
700SG-4.fm Page 11 Thursday, May 28, 1998 1:13 PM