New PC wont boot.

Hey guys. The problem goes like this:

1. I have recently bought and assembled a new PC and yesterday, it just shut down on its own. It was working just fine before, it was built just two days earlier, but I ran the computer without any probems. And yesterday it ust shut down on its own, even though I wasnt doing anything special. Now it wont boot, when I press the button,the system seems to wake up for 1/2of a second and immediatly shuts down.

2. is it normal for a Radeon 4870 X2 to run in idle at 83 degrees C?

Specs: ASUS P6T Deluxe

Core i7 920

Kingston HYPERX 3x1 GB ddr3 1600 Mhz

LC Power 750 Watts

2x640 GB WD Caviar Blue

Sapphire Radeon 4870 X2

Nothing is overclocked or anything. I am pretty sure that all power connections are OK.

Thanks in advance, help is appreciated.

if you mean the CPU heatsink, I did. its ok.

In the catalyst page, once your computer works, make sure you did the fanfix for the 4870.

http://forums.vr-zone.com/showthread.php?t=300495

In the catalyst page, once your computer works, make sure you did the fanfix for the 4870.

http://forums.vr-zone.com/showthread.php?t=300495

Larrymon2000

Hitler's rant. "It should work properly when released. 83C at idle, what kind of Sh*t is this?"

Could be a number of things. First I would check the RAM. Try it with just one stick at a time and see if it will boot.

While I would not try this until I have tried other options, it could be shorting out to the case. To check for this you need to set your parts up outside of the case, like on a phone book or a box.

But if the psu is really blown, how did it work before?(for a day or so)

If its sporadic like you have shown, i would wager it is either :

A. Heat problems that only become a problem when the computer starts breeching a threshold you are teetering on under normal use.

B. A power supply problem that only crops up under a finite amount of load.

If it happens to be the PSU, the likely cause of it not wanting to turn over after it dies would be residual charge in the caps on the PSU itself. You can discharge these caps and reset the circuit to neutral by unplugging the PSU, flipping the power switch to the ON position and then depressing the power button on your case.

Im leaning towards the above since over time the caps inside the PSU will naturally degrade back to a neutral state, thus allowing the PSU to turn over when started. Doing the above process is just a manual alternative to this.