Computer starts up on its own!!
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- Re: Computer starts up on its own!!
Computer starts up on its own!!
06-10-2007 9:59 AM
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For the past week my PC has developed a habit of switching itself on after being switched off. I've just been timing it this morning, & it waits a clear two minutes from being completely powered down to starting up again, so I'm not accidentaly pressing restart.
This only seems to happen in the mornings, my routine is that it's switched on for not more than half hour before going to work, the problem never arises at night when the machine's been switched on all evening.
I'm guessing at a faulty MB / PSU (some sort of power switch problem?), but am generally clueless to as to the problem.
All help appreciated
Re: Computer starts up on its own!!
06-10-2007 10:02 AM
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Re: Computer starts up on its own!!
06-10-2007 10:06 AM
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At first my guess would be something faulty with the power switch connection to the motherboard. I'm not really sure what the solution would be.
If it was me (I'm not saying you should do this!), once I had shut the PC down, I'd remove the power switch wires from the motherboard (just pulling the connector off the jumpers) and see if it starts itself up again.
Then after testing that, I'd connect my reset button to the jumpers for the power switch, and try switching on/off with the reset button connected, then see if it starts itself up.
It would give a good indication/rule out anything to do with the switches themselves and the power jumpers on the motherboard.
EDIT: I'd go with Spiders suggestion first, since it's a lot less intrusive.
Re: Computer starts up on its own!!
06-10-2007 10:07 AM
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I've just checked my network interface properties (it's an nForce Netwoking Controller) and WakeOnLan From PowerOff was enabled.
I've now disabled this, but if that is the cause then I'm puzzled why the problem's only just arisen (I've never touched this setting before).
Re: Computer starts up on its own!!
06-10-2007 10:12 AM
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It won't have arisen previously if you never had anything else on the network. if you did already have more than the one system on the network, it's possible that a driver update for the controller made the setting enabled AFAIK.
Re: Computer starts up on its own!!
06-10-2007 10:20 AM
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I'll try Mike's suggestions about the power / reset switches later.
Re: Computer starts up on its own!!
06-10-2007 10:33 AM
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I'm pretty sure that there's an option in either BIOS, or Windows, that if there's a driver conflict, a driver not working correctly, or some hardware not working correctly, that the PC should reboot instead of actually shutting down. It sounds more likely to be a Windows function, but I'm not sure.
Sorry I can't give any more information at the moment, but I'm sure that a quick search on t'internet will find something out.
Re: Computer starts up on its own!!
06-10-2007 10:38 AM
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Quote from: RobDickson I'm pretty sure that there's an option in either BIOS, or Windows, that if there's a driver conflict, a driver not working correctly, or some hardware not working correctly, that the PC should reboot instead of actually shutting down. It sounds more likely to be a Windows function, but I'm not sure.
If it was simply rebooting, why doesn't it happen until around 2 minutes after it's completely shut down?
Re: Computer starts up on its own!!
06-10-2007 10:42 AM
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It could be a faulty PSU or the power/reset switch cables on the mobo. Or possibly even a mobo fault.
Re: Computer starts up on its own!!
06-10-2007 5:39 PM
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Re: Computer starts up on its own!!
07-10-2007 10:23 AM
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In honesty it does sound like a WOL issue but I have heard of other cases (WOL pointing) which turned out to have just one scheduled task running - Windows had (using ACPI) set the bios to boot the PC up after shutdown.
I've never successfully got ACPI to interact with windows (IE I can't set windows to wake at a pre-determined time) but on some boards it seems far too sensitive.
Take a look, you never know.
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