bad pc

When you say the monitor and video card are good, I'm assuming that you have checked them on another computer.

Do you get any POST beeps from your PC's speaker during boot-up?

Recheck your cable connections between the monitor.

Make sure the video card is properly seated on the MB.

Assuming the video related hardware is good, there are several other things that could cause a failure to boot:

Bad CPU
Bad RAM chips
Bad power supply
Failed CPU fan
Failed power supply fan

You can verify the operation of the fans by simply opening the case and watching/listening.

You have to decide how much time and energy you want to put into trying to solve this problem based on how important this computer is to you (and whether youcan afford a new one).

Based on the general description, for what it's worth - I would say check your RAM. Make sure that they're seated correctly...actually, pop them out and pop them back in firmly, if in doubt as to whether they "look okay" vs. "feel okay".

Withoutany more info, it's too hard to say - my biggest question is whether you know the monitor and video card are good because this system just crashed on you recently - and everything worked at that time...
Or did you actually connect your monitor to another system to eliminate that as one of the potential issues at hand.
If you have any other pertinent info, pass it along and I'm sure given all the facts you can be up and running sooner than later. If all else fails - at least you'll improve your diagnostic skills :) One of the hardest things is gaining the experience needed to trust whether to think zebras or not. I find it to be a 80/20 split - more often than not...it's best to think horses first - then switch over to zebras after you've exhausted all logical cause and effect relationships.
Best of luck, if you have more questions just give me a shout - we'll see what happens.

Mahalo,

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