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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
Summary of Contents for 721TX - TravelMate - PII 333 MHz
Page 8: ...VIII Table of Contents 720 book Page VIII Saturday March 6 1999 10 00 AM ...
Page 62: ...54 System Utilities 720 book Page 54 Saturday March 6 1999 10 00 AM ...
Page 110: ...102 Troubleshooting 720 book Page 102 Saturday March 6 1999 10 00 AM ...
Page 128: ...120 FRU Field Replaceable Unit List 720 book Page 120 Saturday March 6 1999 10 00 AM ...
Page 130: ...122 Model Definition and Configuration 720 book Page 122 Saturday March 6 1999 10 00 AM ...
Page 136: ...128 Online Support Information 720 book Page 128 Saturday March 6 1999 10 00 AM ...
Page 142: ...134 Index 720 book Page 134 Saturday March 6 1999 10 00 AM ...