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Old February 26, 2012, 06:57 AM
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Default Possible PSU failure?

This one is really driving me crazy. These are the system specs for the computer of a one of the guys I work with.

Q6600
2 x 2 GB Kingston Hyper X
Asus Stirker Extreme (replaced by eVGA nForce 680i SLI)
2 x 8800 Ulltras in SLI
way too many HDDs running in 3 x Win7 software raid set ups
Therrmaltake TP-850

He was given the system by a neighbour who was leaving the coutnry and he didn't want to take it with him.

Basically, the system was shut down using the windows shut down button, when it is restarted all the fines light up, hdds spin, all the fans go, but the system will not post. He brings it into me and I strip it down. All the other components....cpu,ram,gpu,hdd all work fine in my s775 set up (even tested folding). Swap my stuff to his original motherboard....everything spins up, no post. So I suspected motherboard failure, the TP-850 psu powers on no problem

There are no visible caps blown/bulging. CMOS has been cleared, CMOS jumper is in place, there are no visible scorch marks or charring anywhere on the board.

Another co worker brings in the eVGA board for him and gives it to him for free. I put all his components on the motherboard (less a few hdds) and it posts no problems at all fist try, everything works as intended...fold test the system, everything seems to be working okay.

Return the system to him, and then four days later he gives me a call...same problem, with the same results.....all his components work fine on my system.

What I now think is that on shut down the psu is over volting, but can't be sure as I don't see anything on either of the boards themselves. Am I even barking up the right tree here?
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Old February 26, 2012, 08:14 AM
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Ya, it sounds like a PSU to me, I would also test the RAM just for the heck of it.
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Old February 26, 2012, 08:30 AM
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Quote:
Basically, the system was shut down using the windows shut down button, when it is restarted all the fines light up, hdds spin, all the fans go, but the system will not post. He brings it into me and I strip it down. All the other components....cpu,ram,gpu,hdd all work fine in my s775 set up (even tested folding). Swap my stuff to his original motherboard....everything spins up, no post. So I suspected motherboard failure, the TP-850 psu powers on no problem
Have to be absolutely clear here.... was the motherboard out of the case? Did you disconnect all of the case connectors (USB / Firewire / reset / Power / etc...........) ?

How about peripherals like HDDs / ODDs / Fan controllers?
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Old February 26, 2012, 08:41 AM
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Completely disconnected everything, took the motherboard out of the case and set it up on a box. Should have mentioned that in the original post.
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Old February 26, 2012, 08:53 AM
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So is the new motherboard in the same boat now (won't run completely stripped down with different hardware)?

If so, my first guess would be PSU, but wouldn't be overly surprised if it ends up being something else (like a USB device he's using at home, and you're not seeing..... ;) ).
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Old February 26, 2012, 08:54 AM
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Yes, the same thing is happeneing to the second motherboard now. Which now leads me to suspect psu, but just to get some other thoughts.
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Old February 26, 2012, 08:59 AM
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Only other thing I can think of is to try hooking up a single HDD for the attempt at posting on the off chance that you haven't already. When you say "too many hdds to count", how many physical drives are we actually talking about?
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Old February 26, 2012, 09:07 AM
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Tried hooking up one hdd and that wouldn't post. Even when the motherboard was replaced it required the two with the OS to boot. We are looking at 2 x WD 500GB with the OS, 2 x WD 500GB as storage 1, a WD 500GB and Maxtor 320GB set up as storage 2. I believe the drives are paried up using windows itself, since I didn't have to enable raid in bios. When I replaced the motherboard the first time only the two OS drives were installed.
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Old February 26, 2012, 11:37 AM
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Thermaltake PSU; bleh.
Striker Extreme; playing with fire
Kingston Hyper X; seen far to many issues

Surprised that it even runs :P
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