I have a fry's computer with an ecs motherboard and 2.8ghz pentium 4. I run ubuntu studio as an os on it but I have had problems on it for quite some time now. It just randomly shuts off without warning (fans and everything stays on display goes blank) and when i try to restart it I just get a blank screen. I tested my power supply with a tester and it checks out ok. It raised suspicion cause sometimes everything just randomly cuts off fans and all. After a while it will just start working again until once again it randomly cuts off. I thought i could be the ram but i did a memtest and they check out ok. I have taken both out and just tried running each one solo. Still no results. Any help will be greatly appreciated.