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Windows 7: Random reboot

08 Jul 2011   #21

Windows 7 64b Ultimate

Check the power settings of all your devices, specially USB and network card. Something is set to something like "this device can wake the computer" :

Attachment 163859

My System SpecsSystem Spec
17 Jul 2011   #22

Windows 7 Ultimate x64

I think I've found the issue.

Two signs put me on the right track: once the PC rebooted while I was playing in the BIOS settings, hence Win7 was unlikely to be responsible.
Secondly, I noticed that tapping on the right side of the case (on a very specific spot) made the PC shutdown/start.

I've removed the front card that hosts 2 usb, some audio plugs, some leds and the power on/reset button and I noticed that the reset button has the tendency to short-circuit itself (resistence goes down not to 0 ohms, but to a few ohms, probably enough for the circuitry to pick up a reset signal and trigger a reboot).

I've hit the button to see if mechanically everything was in place and now it seems to work fine. In any case I've set Win7 to do nothing when the button is pressed (before the action was shutdown). So right now, the worst it can happen (if the button fails again) is that the pC wakes up by his own. In case, I can always try to replace the button somehow.

Thanks for all the support, really appreciated !

My System SpecsSystem Spec
17 Jul 2011   #23

Windows 7 64b Ultimate

Wow, thanks for posting this back... who would've thought it was something like that!!??
My System SpecsSystem Spec


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