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Computer doesn't fully start. PSU suspect.

post #1 of 14
Thread Starter 
Hello all. I posted [http://www.overclock.net/t/1210375/computer-refuses-to-show-video]this thread[/] earlier and I've been testing the PSU. It appears the gray wire on the 24 pin connector isn't sending the OK signal of 5 volts.

My question is should I rma?

Edit: I've since bought a new to me motherboard and the problem persisted. After that I bought a bnib 1045t. And yet it continues to produce the same results. I'm so stumped here can anyone help me?

Edit 2: Well I'm still having issues. It's been a year and the dang thing refuses to work.

I've since recieved a junker computer and the PSU works fine in it. The ram works aswell although one stick apears to be bad. I even use the wireless card in the junker. Just today I applied new thermal paste and reseated the CPU outside of the case to rule that out.

I'm getting so frustrated. I'm at my wits end here. I can't find a single issue that would cause this to happen. Could the psu really be too small for the computer? It doesn't even have a graphics card in it.

If I can get it working I need to sell some of the parts due to a baby on the way. But I can't sell anything if I can't verify everything works correctly.
Edited by Drackula2000 - 1/13/13 at 1:25pm
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post #2 of 14
What voltage is it at? What PSU?
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post #3 of 14
Thread Starter 
I changed it in my sig but it isn't showing. It's a PC POWER AND COOLING SILENCER MKIII 600w I've had it a month. The voltage is varying wildly from 0 to a few volts. All other pins are at the correct voltage as far as I can tell.
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post #4 of 14
Thread Starter 
Bump for any ideas?
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post #5 of 14
Thread Starter 
I'm bumping this thread. I've bought a new mobo and processor the problem still exists. What am I missing here? Everything should be connected correctly. No grounds.

Can anyone help?
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post #6 of 14
Is there another computer around that you can try the PSU on? If that doesn't work then it's the PSU.
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post #7 of 14
Thread Starter 
I've used the psu in a second computer previously and RMA'd once they found nothing wrong with it. However the only thing not be in my computer is the ram. Even taking it out results in no beep. I'm stumped.
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Quadcore!!
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post #8 of 14
try to get a better psu from corsair biggrin.gif and test that lolz. if its not the mobo or cpu, and its not beeping, shouldnt be ram... Or maybe 2 DOA motherboards......thumb.gif
post #9 of 14
Thread Starter 
I don't think it's a low quality psu. It's actually one of the best in its price range. I'm going to try calling the manufacturer tomorrow. It's been a few months since the rma. I have a 5 year warranty.
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CPUMotherboardGraphicsRAM
AMD Phenom X4 9850 2.5Ghz BIOSTAR TFORCE TA790GX NVIDIA 8600GTS 256MB GDDR3 G.SKILL 4GB (2 x 2GB) DDR2 1066 (PC2 8500) 
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Quadcore!!
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AMD Phenom X4 9850 2.5Ghz BIOSTAR TFORCE TA790GX NVIDIA 8600GTS 256MB GDDR3 G.SKILL 4GB (2 x 2GB) DDR2 1066 (PC2 8500) 
Hard DriveOSMonitorPower
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post #10 of 14
Interesting problem thinking.gif So, according to http://www.overclock.net/t/1210375/computer-refuses-to-show-video your computer was running fine until you installed a wireless pci card. Now it powers on but doesn't boot, or there just isn't any video. I'm assuming you tried the suggestions from your previous thread (like testing the ram sticks and clearing cmos). I'd suggest trying another graphics card if you haven't already (borrow one if you have to). Maybe your computer is booting and you just aren't getting video.

If you've already ruled out the graphics card, and assuming your new motherboard and cpu are good, you could try another psu (again, borrow one if you have to). If a different psu runs the computer then your pc power and cooling 600W is probably bad even though it tested good. If no part swaps get your computer running, you could try taking the motherboard out of the case and hooking up the hardware on a makeshift test-bench. If the motherboard boots to the operating system (hook up a hard disk if you get video) then you know that the problem is in the case; maybe something is grounding somewhere, the power button was sticking or your graphics card is binding and loosing bus contact in the case.
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Seagate 7200.9 Seagate 7200.10 Samsung SH182M Yamaha CRW-F1e 
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