Computer shuts off if upright.

October 9, 2009 at 12:28:34
Specs: Windows 7
I know there was a topic about this back in 2005 but it never seemed to get resolved and my problem is a little different.

So I just inherited a free motherboard and processor from a friend who upgraded. Got all my stuff installed and works fine if I lay it flat on the floor. But when I stand it upright it turns off after a few seconds to a minute. If I try to turn it back on after this happens it will power up and shut down almost immediately. And this is a complete shutdown, no power to anything. Lay it flat again and it boots right up no problems.

I don't believe it is the power supply as two different power supplies have lead to the same problem (and they both work fine in my old case/mobo). I also thought it might have been a faulty power button (inherited his old case with motherboard and processor) as when it shuts off it seems as if I had been holding the power button in for a forced shutdown. But turning it on flat, pulling the power button lead from the mobo and turning it upright leads to the same problem.

I can't wrap my head around anything that would seem to be caused by the two different positions. I have tried swapping out video cards and ram hoping maybe it was something faulty there but I'm thinking it's something with the motherboard now. The friend insists he never had that problem and the only thing really different from his and my setup was I have an IDE hard drive and he had SATA drives.

Any ideas?! I'm not sure where to go from here or if it's anything that could be fixed by playing with connections. I have a hard time believing it would be something in the circuitry of the motherboard though just from a change in position.

Any ideas?! Anyone?

Running Pentium D 3.0ghz
Asus P5LD2-VM Motherboard
630W Raidmax powersupply

Any other info needed please ask. I really just want to get the tower under my desk and off the floor :)

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October 9, 2009 at 12:43:37
Maybe the CPU Heatsink and Fan Asssy is not fully seated !!!

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October 9, 2009 at 13:33:42
Hmm... never thought of this. Seems to be ok to my eyes. Would a "tipping" of a cpu or fan assembly cause a complete shut down or a stall? Never removed a cpu while a computer was running... heh. Everything seems tight there though.

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October 9, 2009 at 14:46:12
The power supply is fairly new and all the rails (if I understand the terminology correctly) are wrapped in a black mesh with heat shrink wraps at each connector. I would assume the only connectors which would cause a system wide shut down would be the 4 pin or 24pin connections to the motherboard. All the wires are in good shape and tight.

I'm gonna try taking everything out again and maybe switch everything to another case. I have a weird feeling about this case for some reason. The front plate is closed up tight and I hear a rattle in the space between the plastic face and metal casing. There's an audio jack and usb ports down there and the wires for the runs all the way up the front to the top and the connections for the power buttons and ports come out of the top of the case.

I wonder if there is a stripping wire in these enclosures? Dunno if anyone else is curious (not as much as I am I'm sure) but I'll be sure to report back.
Thanks for replies already. Any other suggestions are still more than welcome :)

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October 9, 2009 at 21:59:30
Dunno if anyone was following this but after taking everything apart and putting it back together my tower seems to be behaving itself now. Wires in the case enclosures seemed fine but there was a piece of metal in there from the rear expansion slots, like the type you punch out of the case to install a pci card, which was the rattling I heard (I have no idea how that got in there, gonna have to question my friend about the one :). Not really sure if it was a loose connection or this mysterious metal piece. Either way, it's working now and I'm hoping the problem won't return any time soon.

Thanks for all those who responded :)

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