Blank Screen Problems

[sbirtwistle]

I've run into a concerning problem with my 4 month old machine.

A couple of weeks ago it started failing to wake from sleep. When I restarted the machine all I'd get was a black screen.

Reseating the memory didn't seem to help, and neither did taking out the chips alternatively and running on half the memory.

Next, it started failing to boot up. Again, a blank screen (I just get "No signal" from my monitor). No bios, no windows, nothing, just a blank screen.

I tried to reseat the graphics card tonight. Now the machine reliably boots, but lasts less than 10 minutes in windows before the screen again goes blank with "No Signal". Otherwise, it seems to be running normally as the fans are all still on, and the keyboard lights etc.

Turning the machine off and on again shows it booting up as normal, but then the crash happens not long after.

I'm a bit lost - I'm assuming the graphics card, but not sure how to verify that or debug further, especially as the motherboard doesn't have onboard graphics.

Spec:
HIS ATI Radeon HD 6950 2048MB GDDR5 PCI-Express Graphics Card
Intel Core i5-2500K 3.30GHz (Sandybridge) Socket LGA1155 Processor
Foxconn P67A-S Intel P67 (Socket 1155) DDR3 Motherboard
XFX Pro 650W Core Edition Power Supply
GeIL 4GB (2x2GB) DDR3 PC3-12800C9 1600MHz VALUE PLUS Dual Channel

 

[lrlcr]

I've just gone through something similar (tracking down a damaged northbridge and ssd, i think) the only way is to systematically replace parts. Ideally beg/borrow parts of friends to test theories.

First bet would be to test the gpu, so stick yours in a mate's pc and try a known good card in yours.

You could also run memtest to see if it is ram related.