Filter
Top Products
Symptom/Error FRU/Action in Sequence
No beep,
power-on
indicator on, and
a blank LCD
during POST
1. Reseat the LCD Connectors.
2. Hard disk connector board.
3. Hard disk
4. Keyboard
5. LCD inverter ID
6. LCD FPC Cable
7. LCD inverter
8. LCD
9. System board
LCD
backlight
not working
LCD too
dark
LCD
brightness
cannot be
adjusted
LCD
contrast
cannot be
adjusted
1. Enter BIOS Utility to execute Load
Setup Default Settings, then
reboot system.
2. Reseat the LCD Connectors.
3. Keyboard (if control is from the
keyboard).
4. LCD inverter ID
5. LCD FPC Cable
6. LCD inverter
7. LCD
8. System board
LCD screen
unreadable
Characters
missing
pels
Screen
abnormal
Wrong color
displayed
1. Reseat all 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
2. LCD inverter ID
3. LCD inverter
4. System board
Keyboard/TrackPoint-Related
Symptoms
Symptom/Error FRU/Action in Sequence
Keyboard (one
or more keys)
does not work.
1. Go to “Keyboard and External
Input Device Checkout” on
page 5.
2. Reseat the three keyboard cables.
3. Keyboard
4. System board
TrackPoint does
not work.
1. Go to “TrackPoint III Checkout” on
page 6.
2. Reseat TrackPoint cables.
3. Reseat the three keyboard cables.
4. TrackPoint board
5. Keyboard
6. System board
ThinkPad 310, 310D, 310E, 310ED (2600) 19