Computer turning off and on, on its own....

By Slayer_ ·
Ok, so this is strange.

It started off two days ago, I closed a cabinet in my room, and when I stood up, my computer turned off and restarted (my computer is set to stay off in a power outage). I figured, maybe it vibrated the video card, its happened before. Ok.
So I wiggle the tower a little, no issues. Stand up, walk passed it from right to left across the front of it, and it restarts again, wtf?

It didn't occur to me yet, but ok, so I just turned it back off (held power button) and walk away. I came back to put the item back in the cabinet, walked passed the machine from right to left again and the computer started itself!
So I waited for it, got to the login screen and it froze at the login....
So I hard restarted it, froze immediately after login, hard restarted again and it was running, but suddenly now, it didn't like resolutions under 1280 x 1024, anything less and it left about 50% black space on the screen on either side (25% on the left, 25% on the right). So I rebooted, I could see the windows logo and post was getting squished. Then it booted up again and 3 seconds after logging in, the screen turned black and white!
I thought maybe my old monitor dying, so I turned on the second monitor and turned on duel view, black and white on both!

So reboot again, same problem. So I go update the video drivers. Problem solved, but it still hates the resolutions. Ok, screw it, moving on.
Last night, it shut down again while watching a movie, it would not beep at the post for the first few tries, then it fired up after I unplugged it for a bit.

Now brings me to today, when I made the real connection.
I fired it up, and walked out to change the TV channel, I came back to grab the stereo remote out of the cabinet, and when I walked passed the computer, from right to left, I heard it restart. So I stepped back, and repeated my walk, and sure enough, it restarted again the very moment I stepped on the carpet.

So I tried standing there, lifting my foot up and down, etc, nothing. Only when I walked passed it. I made sure I did not rub the case, I even tried walking passed it naked, it still restarted! Then I closed the front door on my case (One of those cases that can cover the CD drives) and walked by it, it restarted one more time, so I tried again, on my last walk through, my monitor made a click sound and the video re snapped to the edges properly again. And it has stopped restarting when I walk passed it (for now anyways). I now take the long way around my computer to avoid walking in front of it.

WTF????? Any thoughts?

I double checked, all my games that suddenly had problems with the resolution are fine again.

Here is a folder of images.
The silver computer is the one with the problem. Its ventilation is on the front, left and rear, the right side is where the board is mounted, so no fans. So I can't see there being any ventilation issues.

It has started doing it again. I have removed the filter on the power, its still doing it. But the monitor and display seem fine so far.

Confirmed that the monitor is causing some problems, I can smack it and have the edges of the screen wiggle or even snap to the sides, to the top, etc.
By keeping the door closed the restarting has stopped. I'm starting to wonder if static is affecting the reset button, the next time I am in the case I am going to unplug the reset button and see if that solves the problem.

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All Answers

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Mother Board

by gario In reply to Computer turning off and ...

I had a similiar with an machine and after replacing all the peripherals, it turned out thta my mother board was the culprit.

Good luck!

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Reponse To Answer

by Slayer_ In reply to Mother Board

It restarted when you walked in front of it?
I guess I could replace the board, what was that command to XP so you could change the board without reinstalling?

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definately a motherboard issue

by rapzkilla In reply to Computer turning off and ...

definately motherboard

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Reponse To Answer

by Slayer_ In reply to definately a motherboard ...

Why do you think so? I haven't had a hard look at the board and its capacitors yet but what could be going wrong when I walk in front of it?

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Voodo or No Voodoo???

by jpnagle59 In reply to Computer turning off and ...

Do you have a wood floor, or concrete? It really does not matter, all floor types will flex and move. I would remove all peripherals to the machine, and move all other electrical items- computers, TV's - etc..away. BUT do not move your computer with the 'ghosts' in it at-all if you can. Do the 'mystery' walk again, (everyone has seen a TV picture flicker/fade out when someone walks near it before because of static or body galvanization) with only your machine on. If it does the 'voodoo' again, I bet you have some problem with the mother board. But before taking the machine apart, check the connection of all your cabling used to attach all your printers, USB, monitor's , etc., into the back of the computer. Had a bent serial plug pin one time that drove me nuts... If that problem goes away when the peripherals un-attached, start adding them one by one to see if the problem returns with one of them. I you can, check your BIO's on start up.The fact it is reboot, not rebooting problem, it could be the wiring in the wall, or plugs, sockets, and such, ---plug it in to a different plug socket, with a good ground, some where else- out of the room- you are using the machine in. I just fixed my brother's house where a plug was bad, and badly installed 18 years ago, and his stove would come and go. Check for blue tooth items- in other words, eliminate all that you can, add them back in, and do the one by one test. If all else fails, take the computer to a pre-build state- in other words take it and 're-build it' all over again- One of my favorite test's to do also, is to give the wires and components the 'finger flick'...Take your middle finger, and 'flick' it on the offending device, wires, cords and all. You know the finger I am referring too...a little tap will do you at times...

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Reponse To Answer

by Slayer_ In reply to Voodo or No Voodoo???

I plan to move the computer out this weekend, so I will give it a try.

But first, Dragon Age 2 demo downloaded last night, must try it :).

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So have you actually checked the Power Point for

by OH Smeg In reply to Computer turning off and ...

Loose Wires at it's back where they screw in or the switch being faulty?

Both of those issues could be causing the erratic behavior of you computer.


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Reponse To Answer

by Slayer_ In reply to So have you actually chec ...

Well I of course haven't pulled the plug from the wall. But erratic doesn't really explain why it restarts when I walked passed it. if it was a power issue, the board is set to keep the computer off in the event of an AC failure. Also, the second computer is plugged into the same outlet and is not having any issues.
But come to think of it, one day I came home and the breaker for that plug was mysteriously tripped. If it happened again (Which it hasn't) I was going to replace the breaker.

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It can't be the circuit breaker

by JOTEK_ATLANTA In reply to Computer turning off and ...

The CPU could be overheating, or Motherboard has a short, inspect the board to see if any of the capacitors are bloated, if they are the board is bad, Check the CPU fan and the temperture. If it keeps rebooting it has a virus.

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Reponse To Answer

by Slayer_ In reply to It can't be the circuit b ...

CPU temp is good, between 40 and 50C, GPU temp is good, between 50 and 60 at idle.
Definitely no viruses, and has nothing to do with the OS, as I can walk in front of it while it is performing POST and cause it to restart again.

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