shutdown after 1sec with 1 PSU, but not other

Thermaltake Tr2 600w atx12v & eps12v pow...
January 19, 2011 at 08:08:31
Specs: Windows XP, Phenom II X3 715 - 4GB DDR2
Greetings,

The power supply in my computer recently died and I ordered a Thermaltake TR2 600W to replace it. When I plug the power supply in, the power supply and cpu fans spin for about a second then everything shuts off. I've plugged the power supply into another computer, and everything works fine, with 2 hard drives, CD and nvidia 7900GTO video card plugged in. I tried the cheap 20$ no-name 450w power supply from that computer into mine and everything works fine, with 2 hard drives, 2 CD and a nvidia 8800GS video card plugged in. I stripped all possible components from this computer to only a single HD (the motherboard has an on-board video) and the Thermaltake power supply still only powers for about 1 second before sutting down. All tests were conducted from the same wall electrical outlet. Do you have any idea what might be causing this, why is the power supply working fine in one computer that requires a decent power load while nothing happens in the other computer even when the load is lightened to the max? Does the thermaltake power supply read error codes from the motherboard or some such and shut down while the cheap power supply just dumbly supply power?

Thanks!


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#1
January 19, 2011 at 09:04:56
Does the thermaltake power supply read error codes from the motherboard or some such and shut down while the cheap power supply just dumbly supply power?

No quite but the chip-set on the motherboard does control the power supply and will shut it down if it detects a fault condition like a short circuit. Cheap power supplies may not have all the control circuits necessary to allow it to respond to the signal from the motherboard.

I would say there is nothing wrong with the power supply but there is something wrong with the motherboard that the Power On Self Test is detecting and it is shutting down the power supply to prevent further damage.

If you continue to use the cheap power supply you may eventually damage something beyond redemption. I would find out what is causing the shut down which could be near impossible as you already done the standard trouble shooting procedure by stripping out everything that is not necessary.

The only other thing you can do is remove the remaining hard disk. At least you should still get a BIOS screen and a prompt to insert system disk. If you get that far and no shut down then you have found the problem. If you have more than one memory module try removing one then the other and see if that makes any difference.

Stuart


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