Compaq 1230 Maintenance & Service Manual page 67

"Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1230 and 1232
Screen is blank.
Display is blank and the Suspend icon
is flashing.
Internal display is blank and the
screen on an external monitor displays
information.
Problem
Internal display flashes or has garbled
characters when computer is connected to
external monitor.
The light tubes on the edge of the display
panel do not light up at all and Power-On
Self-Test (POST) completes when the unit is
powered up.**
The light tubes on the edge of the display
panel do not light up at all and Power-On
Self-Test (POST) does not complete when
the unit is powered up.**
Backlight (brightness) cannot be adjusted
with Fn + F7 (¯ ) or
Fn + F8 (- ).***
Contrast cannot be adjusted with
Fn + F5 (¯ ) or Fn + F6 (- ).
file:///C|/SERVICE%20MANUALS/COMPAQ%20_%20chec...RIO%201200%20SERIES%201230%201232/solving.html (5 of 8)6/27/2004 2:20:26 AM
Screen save was initiated by Power
Management due to lack of user
activity.
Display has overheated.
System is in Suspend mode.
Display function was switched to the
external monitor.
Probable Cause
Using 1024 × 768 or higher
resolution on external
monitor and have toggled
back to internal display,
which supports up to
800 × 600.
Improper backlight or
display cable connections
Defective inverter board.
Defective display cable.
Defective display panel.
Defective system board.
Defective system board.
Improper display cable
connections.
Defective inverter board.
Defective display cable.
Defective system board.
Improper display cable
connections.
Defective inverter board.
Defective display cable.
Defective system board.
Press any key or touch the Touch Pad.
If computer is in direct sunlight,
move it and allow it to cool off.
Press any key or touch the Touch Pad.
Use Fn + F2 to switch between LCD
or CRT.
Solution(s)
Restart the computer.
Replace the display assembly.
Replace the display assembly.
Replace the display assembly.
Replace the display assembly.
Replace the system board.
Replace the system board.
1. Reseat the display cable to the
system board.
2. Replace the display assembly.
Replace the display assembly.
Replace the display assembly.
Replace the system board.
1. Reseat the display cable to the
system board.
2. Replace the display assembly.
Replace the display assembly.
Replace the display assembly.
Replace the system board.