Your monitor said no signal, not your video card. Monitors have their own programs internal which tell you the video card isn't sending it a signal. What LED lights up? The harddrive led or the memory led on the motherboard?
I'd suspect either power supply or blown capacitors on the mobo. I think your mobo is in that time frame of the bad capacitors. Look on it around the CPU area for large capacitors and see if they are leaking or pushed up off the board. If they aren't sitting straight, but tilted then it means they are blown at the bottom. Here's an article about them.
My computer wont turn on when i hit the power button in the front, although i know the mother board the gets power because there is a led that lights up when theres power. First my video card made my monitor say no signal, and a few days later my motherboard stopped working. Any ideas whats wrong?
System: (Yes, i know its old, but it works)
CPU: AMD XP-2600 Athlon
Ram: 2 Sticks of 256MB
Hard drive: Maxtor 80GB
Motherboard: Asus A7N8X-X
Video Card: Powercolor ATI 9200 128MB
Windows XP Service pack 2
Case, Cooler Master Centurion 5