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  PC shuts down, but after several days, it will power back on. Rinse Repeat... 
 
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Nate Leech Apr 28, 2013, 04:56pm EDT Reply - Quote - Report Abuse
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I have a strange issue where I will enter the room to find my PC has shut down and I can do nothing to get it to turn back on. I didn't mess with it for a few days and one day I just decided to hit the power button again to see if anything would happen. Magically, it just powered back up!
I'd be fine if that was the end of it, but about every 5 or 6 days, it will power down again, refusing to turn back on until several days after that.

Is this a PSU problem? I don't want to purchase a new one and find out that something else is causing this issue. Any help would be appreciated.

Thanks!


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angryhippy May 08, 2013, 06:55pm EDT Reply - Quote - Report Abuse
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>> Re: PC shuts down, but after several days, it will power back on. Rinse Repeat...
Just a thought. Are you on Windows7? Open up event viewer. Windows logs open "system". Look for an entry that says "information", then "power troubleshooter" around the time it started back up. See what it says under "wake source"...? I've been having some weird issues since my last windows update download and install, when the computer wakes from sleep. Not your same problem but...try uninstalling the last couple of update days and see if it fixes it. I think there was a sketchy update in there. My problem is there is no keyboard when it wakes. I have to unplug then re-plug to reset the drivers. It just started doing this.

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Naveen Goud May 09, 2013, 05:55pm EDT Reply - Quote - Report Abuse
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>> Re: PC shuts down, but after several days, it will power back on. Rinse Repeat...
Hi,

They are two things I can guess out of the issue. One may be you are not plugging your laptop and so due to the battery drain out, the PC is shutting down. Since, the shutdown is not a proper shutdown; it is failing to powerback/boot-up again. Sometimes it requires repair, where windows 7 offers startup repair option. But XP doesn't.

The other issue is that your PC might be getting into sleep or hibernate mode and you are misjudging it to be shutting down and pressing the power button.

BTW what is your PC make and model? And what OS you are using?


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Nate Leech May 09, 2013, 07:59pm EDT Reply - Quote - Report Abuse
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>> Re: PC shuts down, but after several days, it will power back on. Rinse Repeat...
Sorry, I didn't specify that this was a desktop PC I built myself. I went ahead and bit the bullet to buy a new PSU. So far it's been 4 days without a random shutdown. It could still happen, though. It's gone a couple weeks before without the random shutdown.
It doesn't turn back on by itself, it just randomly allows me to turn it back on. I would press the power button every day for a few days and nothing would happen. I would unplug it, plug it back in... nothing... and every day, I would press the power button. Suddenly, one day, it powered up!
I checked the event viewer for when it allowed me to power it back on. I saw a "critical" message that said: "The system has rebooted without cleanly shutting down first. This error could be caused if the system stopped responding, crashed, or lost power unexpectedly."

Not sure how helpful that is.

I am running on Windows 7.

Again, I'm hoping with this new PSU, it won't do it again. I'll report back if it does! Thanks for your replies.

Daniel Robinson Sep 17, 2013, 05:22pm EDT Reply - Quote - Report Abuse
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>> Re: PC shuts down, but after several days, it will power back on. Rinse Repeat...
I'm having the exact same problem! My desktop PC stops working for a day or two. Nothing I do will get it to boot up. Its just dead. Then all of a sudden I'll try pressing the power button after waiting a couple days and it will start up no problem. I too am using Windows 7. Ill have to check the event viewer too when it decides to work again. Ill let you know if I find a fix

Nate Leech Sep 17, 2013, 05:55pm EDT Reply - Quote - Report Abuse
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>> Re: PC shuts down, but after several days, it will power back on. Rinse Repeat...
Daniel, I fixed my problem. I actually did have to buy a new PSU unfortunately, but at least it's working again. Good luck!

john albrich Sep 17, 2013, 06:20pm EDT Reply - Quote - Report Abuse
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Edited: Sep 17, 2013, 06:44pm EDT

 
>> Re: PC shuts down, but after several days, it will power back on. Rinse Repeat...
.
Daniel, if you can't measure the PSU voltages with a meter (following the warnings I posted in your other post on this same problem,
http://www.hardwareanalysis.com/content/topic/78706/#597448
then Open Hardware Monitor (and similar programs) may be able to report the various voltages from the sensors on your motherboard if they exist.

OHM also shows you the Max and Min values for a given parameter (such as the PSU's +5V rail) over any period of time...which may help you see any power supply problems. Your motherboard/computer may also have come with a program that can do the same or similar.

For example, you can run your computer for awhile and see if the PSU voltages ever go above or below their specified limits or vary substantially which could indicate possible stability problems.

There are also some system monitoring programs (like Speedfan) that have the ability to keep a frequently updated log of the values which can be analyzed for variances.

Note: these programs, a simple voltmeter, or a commonly sold "PSU Tester" will NOT expose every possible PSU shutdown-causing problem possible, but they will catch the more or less steady-state voltage issues.


http://www.majorgeeks.com/files/details/open_hardware_monitor.html

Naveen Goud Sep 19, 2013, 05:04pm EDT Reply - Quote - Report Abuse
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>> Re: PC shuts down, but after several days, it will power back on. Rinse Repeat...
Hi,

Is your power source grounded and is it happening during rainy or humid conditions?

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