Help me Frankenstein this machine back to lif

June 15, 2009 at 12:48:52
Specs: Windows XP
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.

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June 15, 2009 at 15:32:33
How about some specs on all the hardware in the case?

Sounds like overheating to me. Did you install the heatsink by using the proper amount of thermal compound or a thermal pad?

Boot into the BIOS screens (del) and go to PC Health. Just sit there for 10 minutes or so and see what the temperatures go to. Post the results back here along with some specs.

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June 15, 2009 at 20:15:10
Looking back at my original post, I realize I didn't make it clear that, that first day when it was shutting itself off, it eventually just stopped coming on altogether. I'm pretty sure that's a pretty big part of the problem to leave out.

But as it stands, I can't get it to boot at all. No POST beeps, can't get to the BIOS screens, nothing.

As far as the hardware I'm working with:
GIGABYTE GA-MA790GP-UD4H Motherboard
AMD Athlon 64 X2 7750 Kuma 2.7GHz Processor
Antec earthwatts EA430 430W Power Supply
SAPPHIRE 100154 Radeon X1800XT Video Card

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June 15, 2009 at 20:30:55
No post screen or beeps? I'd look at the cpu. Try removing the cpu fan/cooler. Look at the thermo paste. Look bad or grayish? If you can gently clean the cpu and cooler. Remove all of the old thermo paste. Apply 1 small drop of new thermo paste (artic silver is a good brand). Important! 1 small drop lol. When you reseat the cooler gently wiggle it on the cpu to spread it out. I've had cpus with bad thermo paste randomly shut down and refuse to post. G/l.

WinXp Amd 64 3000 Msi Neo2 Platinuim 1 gig ddr 400. When we cast a pebble into a pond we should look past the first ripple.

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June 15, 2009 at 20:36:02
And yes the gpu can cause random lock ups. Pick up a cheap card (even an old pci card will do). Newer cards post (sorta) before the system does.

WinXp Amd 64 3000 Msi Neo2 Platinuim 1 gig ddr 400. When we cast a pebble into a pond we should look past the first ripple.

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