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Note: To check the versions of the video drivers, follow
these steps:
In DOS.
Drivers display their version level when they are
loaded. To check them after they have been loaded,
look in CONFIG.SYS or AUTOEXEC.BAT files for
video driver information.
In Windows.
Drivers installed using the video driver installation
utility place an icon in the Control Panel, in the Main
group. Double-click on the ChipsCPL icon to display
the driver dialog box. Choose the Version button to
display the driver level.
Symptom/Error FRU/Action
No beep, power-on indicator
on, and a blank LCD during
POST.
1. Adjust contrast.
2. Top System Board.
3. Bottom System Board.
LCD backlight not
working, or
LCD too dark, or
LCD brightness cannot
be adjusted.
1. Reseat LCD
connectors.
2. Reseat inverter card.
3. Inverter Card.
4. LCD Assembly.
LCD contrast cannot be
adjusted (ThinkPad 701CS
only).
1. Reseat LCD
connectors.
2. Top System Board.
3. LCD Assembly.
LCD screen
unreadable, or
Characters missing
pels, or
Screen abnormal, or
Wrong color displayed.
[See important note for
“Disassembling the LCD
Assembly” on page 172.]
1. Check that the latest
versions of the
drivers are installed.
2. Reseat LCD
connectors.
3. Bottom System Board.
4. LCD Assembly.
LCD has extra horizontal or
vertical lines displayed.
1. LCD Assembly.
Blank LCD, system runs
correctly during POST.
1. Check display type.
(Press Fn+F1 to enter
the Configuration
Utility, and then reset
Display type to LCD.)
ThinkPad 701C/701CS (2630) 147