Hardware Problems (Video Card Maybe?)

Ok, so here comes a long winded story…

So yesterday afternoon I get home to turn on my PC… check some email and stuff… shut off my monitor and leave for a friend’s house, leaving the computer running.

I get home, turn on the monitor, and the standby light comes on… The computer is on still, but not sending any signal to the monitor. So, i have my computer set up to shut down XP when I press the power button, I do this, but no go. I do a hard reset, and the computer boots up fine. I start checking some email again for about 30 mins, and I see my monitor start to “fuzz up” (kinda like bad TV reception) for about 1 or 2 seconds, and then it went into standby. This time I try turning on and off the monitor, unplugging the d-sub cable from the vid card, etc, etc. but to no avail. I try to shut the computer down via the power button again, but no go again… so another hard reset.

So, at this point, I figure it’s not the monitor, as the computer stops responding when this happens. This happened another 2 times last night, so I checked the video card temp, which was at 44 degrees Celsius.

It was freakishly hot yesterday (about 34C), so I think this MAY be from overheating… I have alot of components in my case, so it generates alot of heat, but the video card temps seemed OK. Any insight into what this may be?

The specs:

DELL 4500
P4 2.0Ghz
768RAM
40GB HDD
16xDVDRW
40xCDROM
ATI RADEON 9600XT
WINTV PVR150
Sound Blaster Live 24-bit
56KMODEM