|Okay, this machine's been giving me problems for a while now; I haven't gotten it to start up at all since it first went out on me, and I posted this:|
"I turned my computer on today, and everything was running normally; I went about my business for a couple minutes until it just shut itself off. All the peripherals stayed on and acted like I had just performed a hard shutdown.
If I leave it alone for a while, I can turn it back on, and it works fine until eventually shutting itself off again; the longer I leave it off, the longer it runs when I turn it on again."
I replaced the power supply to no avail, but it did do something new, thus I posted this:
"When I plugged the new power supply in and hit the power button, both the cpu fan and the graphics card fan spun for a quick moment like they'd been given just one push and then shut off. If I shut off the power supply and wait for the green light on the motherboard to turn off and then turn it all on again, they'll do the same thing: quick burst of power, shut off. The green light stays on the whole time. Nothing else seems to be happening or trying to turn on. My old power supply won't give me that little burst. Could it just be that the replacement isn't giving out enough power? The old one was 450W, the replacement's 430."
I tried replacing the motherboard, the cpu (twice), tried only the essential components on cardboard outside of the case, every combination I could work up, nothing was changing. Now, aside from the power supply, these replacements were all garnered from ebay and amazon (I know, I know), so there's probably a higher chance that some of them were DOA, but I was getting really frustrated with the situation, so about a week ago, I just decided to go with a whole new motherboard/cpu/RAM setup and a new hard drive. And ... nothing. It's the exact same behavior with almost a completely different setup. I can get that one short burst of power to the fans, and nothing else.
Could the video card cause these problems? Stop the entire system from starting up? It's the only part I haven't replaced, which is the only reason I ask. But when I plug the monitor in, it switches its display from "System cable unplugged" to "DVI no input signal," so it recognizes that the cable's connected, which makes me think it's not the video card.
Other than that, I'm leaning towards my new motherboard being DOA, or the original power supply giving out and the replacement power supply being DOA. Actually, now that I think of it, that makes sense, as it was one of only two parts, along with the video card, from both the old and new systems. I guess I'll try replacing it, but please, please, please, if anyone has any other ideas, let me know. This is getting expensive.
Thanks for any help.