Hello everyone. I've asked before, and I've done one thing about it, which didn't seem to fix my problem. Pentium 4 Northwood 3,2GHz ATI Radeon 9800 Pro 256mb Kingston ValueRam PC3200 (2x512) It happens irregularly - the screen goes black and shows "no signal" and the sound stops playing. I have to turn the power off and on again to even make it work, as it doesn't reboot itself. What one of the possibilities could be, was a faulty PSU, which I eliminated by buying an Antec 500W PSU, which is just an overkill for my machine. Ok, so I went playing. I played for almost a week (my screen usually would have went black already after that long) and thought: "Hey, no blackout after a week!? My problem must be fixed!" and I was all happy. But what happened just today? I think you can tell. Before the PSU-switch my CPU-temperature maxed at 65 celcius degrees, and now it maxes at 63. But as I mentioned above, I could run a lot longer with the new PSU, than I could with the old one. I have no idea why it is like that, but my only thought is the small temperature change. Now I'm just wondering.. Is the CPU-temperature the problem now, or is it a completely different thing? I would greatly appreciate help, as I'm so sick of this problem, and I don't have money to buy a whole new computer. Thanks in advance.