|When you get no video, usually there's nothing actually wrong with the monitor or the video adapter - something else is wrong. It's easy to test an external monitor by trying it with another computer.|
(I'm assuming that if this computer has both an onboard video port and a video port on a grahics card in aslot, you have it plugged into the card - in almost all cases, installing a video card in a slot disables the onboard video - however, in that case the computer should still boot okay in most cases.)
For some suggestions about what you could check for, see response 2 in this recent Topic,
Probably the most common reason a computer won't boot ....
In addition, rarely, sometimes you have the bad capacitor problem.
Open up your case and examine the mboard to see if you have bad capacitors, and/or other findable signs of mboard damage .
This was the original bad capacitor problem - has some example pictures.
History of why the exploding capacitors and which mboard makers were affected:
What to look for, mboard symptoms, example pictures:
Home page that site
- what the problem is caused by
- he says there are STILL bad capacitors on more recent mboards.
Pictures of blown capacitors, other components, power supplies, Athlon cpu's, etc.: