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Troubleshooting 3-29
Table 3-28
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.
The image on the external
monitor does not fill the screen.
You are using an external monitor
and simultaneously displaying an
image on the computer display.
This is typical; no action is required.
Small red, green, or blue spots
appear on the computer TFT
display.
Small spots, called on-pixels, often
appear on TFT screens. Compaq
limits the number of these on-pixels
to 0.003% of the approximately
1 million transistors that are on a
12.1-, or 11.3-inch display.
This is typical; no action is required.
When in MS-DOS mode,
the image on the computer
display does not fill the screen.
When displaying simultaneously,
the image on the external
monitor may not be centered.
To maintain a high-quality image, the
800 × 600 models do not
stretch the lower-resolution
image of MS-DOS mode to fill the
screen.
This is typical; no action is required.
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