Solving Display Problems - Compaq 1230 Maintenance & Service Manual

"Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1230 and 1232
Diskette drive cannot read a diskette.
Cannot boot from diskette.

Solving Display Problems

This section lists some common causes and solutions for computer display and external monitor problems.
You can perform a monitor self-test on an external VGA color or monochrome monitor by disconnecting the monitor
from the computer. To do so, complete the following steps:
1. Turn off the monitor.
2. Turn off the computer.
3. Disconnect the monitor signal cable from the computer.
4. Turn on the monitor and allow it to warm up for one minute.
The display should be white. A narrow black border may also appear on the left and right sides of the display. Either of
these displays indicates that the monitor is working properly.
Problem
Screen is dim.
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Drive error has occurred.
Diskette is not formatted.
The wrong type of diskette is being
used.
Diskette has a bad sector.
Drive error has occurred.
Diskette is not
formatted.
Bootable diskette is not in drive A.
Diskette Boot has incorrect setting
in Computer Setup.
Solving Display Problems
Probable Cause
Control for brightness or contrast (if
applicable) is not set properly.
Computer screen is in direct light.
Run Computer Checkup from the
Compaq Diagnostics diskette.
Format the diskette. At the system
prompt, enter
FORMAT A:
Use the type of diskette required by
the drive.
Copy files to hard drive or another
diskette. Reformat bad floppy.
Run Computer Checkup from the
Compaq Diagnostics diskette.
Format the diskette. At the system
prompt, enter
FORMAT A:
Put the bootable diskette in drive A.
Run Computer Setup and set diskette
as first to boot.
Solution(s)
Adjust the Brightness of the display
by using Fn + F7 (¯ ) or
Fn + F8 (- ).
Adjust the Contrast of the display by
using Fn + F5 (¯ ) or
Fn + F6 (- ).
Tilt display or move computer.