Compaq.com - Compaq Presario 1200 Series Maintenance and Service Guide - Models: 1255, 1256, 1260, 1262, 1266, 1267, 1272, 1273, 1274, and 1275

Screen is dim.Screen is blank.
Control for brightness or contrast (if applicable) is not set properly.Computer screen is in direct light.Screen save was initiated by Power Management due to lack of user activity.
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.Press any key or touch the Touch Pad.

Display is blank and the Power icon is flashing, or the Suspend icon is present.

Internal display is blank and the screen on an external monitor displays information.

Internal display flashes or has garbled characters when computer is connected to external monitor.

Display has overheated.System is in Suspend mode.Display function was switched to the external monitor.

Using 1024 × 768 or higher resolution on external monitor and have toggled back to internal display, which supports up to 800 × 600.

If computer is in direct sunlight, move it and allow it to cool off.

Press any key or touch the Touch Pad.

Use Fn + F3 to switch between LCD or CRT.Restart the computer.
The light tube-s on the edge of the display

 

Improper backlight or display

 

Replace the display assembly.
panel do not light up at all and Power-On

 

cable connections

 

 

Self-Test (POST) completes when the unit

 

 

 

 

is powered up.**

 

 

 

 

 

 

 

 

 

 

 

Defective inverter board.

 

Replace the display assembly.

 

 

 

 

 

 

 

Defective display cable.

 

Replace the display assembly.

 

 

 

 

 

 

 

Defective display panel.

 

Replace the display assembly.

 

 

 

 

 

 

 

Defective system board.

 

Replace the system board.

 

 

 

 

 

The light tubes on the edge of the display

 

Defective system board.

 

Replace the system board.

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

 

Improper display cable

 

1. Reseat the display cable to the
with Fn + F7 or Fn + F8.

 

connections.

 

system board.

 

 

 

 

2. Replace the display assembly.

 

 

 

 

 

Contrast cannot be adjusted with Fn + F5 or Fn + F6.

Defective inverter board.

Defective display cable. Defective system board.System may have a TFT display (which is always at maximum contrast)

Replace the display assembly.

Replace the display assembly. Replace the system board.No adjustment is possible.
Improper display-cable connections.
1.Reseat the display cable to the system board.2.Replace the display assembly.
Defective inverter board. Defective display cable.
Replace the display assembly. Replace the display assembly.

file:///C/SERVICE%20MANUALS/COMPAQ%20_%20check...1272,%201273,%201274,%20and%201275/solving.html (5 of 8)6/28/2004 9:23:11 AM