My sister has a Compaq Presario C500 notebook. It is out of warranty coverage. One day my sister shut the cover as she traditionally does and when she opened it again the next day, there was no backlight. You can still see a faint image when held at the correct angle with some ambient light. I hooked it up to an external monitor to double check this and the computer is outputting the signal fine. So I've narrowed it down to three things.
Lid switch that automatically turns off the backlight
Inverter, supposedly fails more often the backlight
The actual backlight
Now I'd like to rule out the free option before I start picking up replacement parts. However, I cannot find the darn switch. I've taken the laptop apart completely and I just can't seem to find anything. Please help me as she'll be bugging me until I fix it. If/when I rule out this switch, I'll proceed to the more expensive possibilities. Thank you very much.
If its anything like my dv9000 you will find it on the cooling fan shell. It is only about 15mm long and about 8mm wide. Is either stuck on with doublesided tape or one screw. Has a wire harness (small) that goes to power switch. It is operated by, I think, a magnet in the bottom of the screen cover. Hope that helps you out.
This topic has been archived. Information and links in this thread may no longer be available or relevant. If you have a question create a new topic by clicking here and select the appropriate board.