My new-built PC has a problem - the monitor powers itself off - generally when the PC is stressed (ie in games - Bioshock and Oblivion both do it to it, other games are stable) - it won't come back on even if I turn it off and on again, nor will it respond to keypresses/mouse movement. However, the noise of the PC carries on - the lights are still on, it seems it's only the monitor going off / maybe the GPU?
I have done the following tests - I'm trying to find out if it is related to CPU/Memory/GPU etc.
Please can you help me by suggesting what I should do next?
1 - Memtest86 - Screen went into standby after 15 mins. Would not come back on as above. GPU had been whirring as though 100% (see full specs below).
2 - Memtest86 - Screen went into standby after 40% of the test - about 25 mins I think. GPU had been much quieter this time - I had made NO changes in between, so I don't know why it was suddenly quieter. PC case was cool inside, RAM was cool
Comments - If the memory had failed wouldn't it have come up with a different type of failure rather than the monitor going off? I mean, Memtest really does nothing to test the GPU, so I'm confused at this result...
1 - Orthos (small FFTs - stress CPU) - Ran for only 1 minute! Then the same thing - monitor powered itself off, would not come back. However, this test was done very soon after the ones above, so I repeated it -
2 - Orthos (small FFTs - stress CPU) - Having given the computer 30 mins to cool down. Stable after 54 minutes - in fact it's running now.
1 - Ati Tool was stable after 1 hr of artifact testing
PSU tests - is there a way to specifically test the PSU? I know very little about PSUs to be honest and could use some help.
Motherboard tests - are there any tests specifically for the mobo?
CPU: Dual core 2180
GPU: 8800 GT - Point of View
Motherboard: Gigabyte P35 DSL
Hard disk: 1/2 TB Samsung HD501LJ
Memory: 2x1GB Corsair XM2
Power Supply: Not a good one, will check details when current test finishes!
Thoughts most welcome.