PC not starting up

Hewlett-packard / M8226x
December 11, 2009 at 18:16:03
Specs: Windows Vista
If I turn my PC on, it shuts down after a few seconds. No ammount of waiting changes the amount of time it stays on. As such, I am unable to even reach BIOS let alone Windows functions. This is a recent issue that has gotten worse over a few days, ending with this result. It used to stay on indefinitely if it made it to windows during boot-up (which was 1/3 times roughly) but now won't turn on at all. I ran speedfan on the comp when I first noticed the problem, but neither CPU or GPU ever went over 42*C under load, idling at about 37*-39* and all fans worked properly. Even so, I replaced the CPU fan with no effect. My second guess was the 300W PSU, which I upgraded to 650W, also with no effect on the problem. Also, I have recently replaced the motherboard with a new stock model, after the first burned out along with a new graphics card. The first MoBo burned out after I had OC'd my HIS X800GTO. After replacing the first motherboard and graphics card, the computer has run flawlessly for ~3 months. I am running out of ideas as to what might be causing the issue, and would appreciate some help with it. The basic hardware in the PC is:

-AMD X2 6000+ processor
-nettle2 MoBo (new stock)
-MSI 9600GT (Nvidia card)
-3GB DDR2 (2x 512 2x1024)
-500GB HDD
-Antec Earthwatts 650W PSU

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December 11, 2009 at 18:35:47
Strip down to barebones. Disconnect power & data cables from all drives. leave only motherboard. CPU with HSF. 1 stick of RAM, PS/2 keyboard & graphics. Unplug any USB devices and take out any other PCI cards.

Disconnect your front panel wires as you only need to temporarily bridge the power on pins to test bootup. I normally do this with a screwdriver. Will it start up and boot into BIOS? When you replaced the CPU fan did you clean/renew the thermal paste between heatsink & CPU?

Given that your "new" powersupply has dual 12V rails rated @ 22A each is the load balanced?

Goin' Fishin' (Some day)

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December 14, 2009 at 10:21:13
Thanks, I just tried stripping it down 1 piece at a time, and it seems to like having only 1 stick of ram, full boot to windows after re-hooking up the HDD. now i suppose i just gotta find out which stick provided this little headache and hit it with a hammer. Guess I was a bit quick to asume it was a PSU or heat issue

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December 14, 2009 at 17:01:36
My guess would've been that something overheated too.

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