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Troubleshooting
2-29
Table 2-28
Solving Screen Problems
Problem Probable Cause Solution(s)
Characters are dim. The brightness or contrast
(if applicable) control is not
set properly.
Adjust the control(s)using
Fn+F9
(contrast) and
Fn+F10
(brightness).
Computer screen is in direct light. Tilt the display or move computer.
Display is damaged. Replace the display.
Screen is blank. You initiated QuickLock/
QuickBlank.
Enter the password to exit
QuickLock/QuickBlank.
You may have another screen -
blanking utility installed.
Press any key and/or enter the
password.
Screen save was initiated after
the Power Management timeout
period of inactivity
Press any key or click the mouse.
If an STN screen is used, brightness/
contrast needs adjusting.
Use the hotkeys to adjust the
brightness/contrast.
Screen has overheated If the computer is in direct sunlight,
move it an allow it to cool.
Suspend was initiated. Press the suspend button to exit
Suspend.
Computer screen is blank and
the screen on an external
monitor displays information.
Display was switched to the
external monitor.
Press the
Fn+F4
hotkey to display
information on the computer screen.
Screen is blank and the
power/suspend light is blinking
System is in Suspend Press the Suspend button to exit
Suspend. Enter the power-on
password if prompted.
Screen is blank, the power/
suspend light is blinking, and
the battery light is blinking
System has entered a low-battery
condition
Immediately connect the computer
to an external power source or
replace the battery pack.
External monitor does not
display information
External monitor was connected
after the computer was turned on
Press the
Fn+F4
hotkey to switch to
the external monitor
The external monitor signal cable
or power cord is not properly
connected.
Verify the cables are properly
connected.
Distorted or garbled characters
on the screen are mixed with
text.
The
ANSI.SYS
driver is not in the
CONFIG.SYS
file or the path is
incorrect.
Add the
ANSI.SYS
driver to the
CONFIG.SYS
file. Add the following
line: DEVICE=C:\ANSI.SYS
Garbled characters on internal
display or flashing internal
display when connected to
external monitor.
You are using 800 × 600 or higher
resolution on external display and
have toggled back to internal
display, which only supports
640 × 480 resolution.
Restart the computer. If
simultaneous display is desired, use
640 × 480 resolution.
Continued