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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Reponse To Answer

by Slayer_ In reply to would that system be loca ...

Nope, it would be north
Nice thought though :)

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

How old is your computer? I ask because at a certain age they can sometimes experience electrile disk function. Maybe your hard drive has gone floppy. And, perhaps the computer is not actually getting turned off, but is using that as a coping mechanism because it is embarrassed. Did it ever have issues with it's Motherboard?

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Reponse To Answer

by Slayer_ In reply to E.D.

When it was new it did, it refused to even start POST unless the CMOS jumper was in the reset position, after a few hundred tries it suddenly became happy and started working properly, has been every since. Its about 2.5 years old now.

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not enough juice in the wall

by terajay2 In reply to Computer turning off and ...

I once had a computer that would shut off at random times and for no apparent reason. After I spent a lot of money replacing different things, I realized that I had too many computers and other electrical things, plugged into a 15 amp circuit. Just an idea...

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Reponse To Answer

by Slayer_ In reply to not enough juice in the w ...

Its possible, though in my last house, the main floor, basement, and all electronic devices, everything, was run from a single 15 amp. I'd think a 15 amp should be enough for 2 computers. I guess its possible the HDTV on the other side of the wall, the outlet shares the same line. That would explain why the shutdowns have happened while watching movies. Doesn't explain why it would restart when I walked passed it from right to left.

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Left to Right

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

Carpet has nap that lays down in one direction, and stands up in the other (when pushed against). You are causing more static in one direction than the other, when you walk.You are prob. generating static that is causing a reboot. You strip is not of high quality at this point, as you stated it corrected some harsh problem before. It is prob. at the end of its useful life. They do not last for ever. Buy a good one or a good ups. Your pics of the rack show it is not isolated from the carpet. Put some wood under those wheels, (an extra shelf that is not needed would work). Verify your ground is actually working, (testers are about $6.00). It only takes 10 volts to cause a video card or mother board to fail, or cause an upset failure (works but not like it should). If you were to hear static snap that would be 1500 volts. So you can image what just walking by would cause.

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Reponse To Answer

by Slayer_ In reply to Left to Right

Replace bar and filter, got it.

Wait, didn't I already remove the filter... Anyways, I will try replacing the bar as well, and the reset button sounded like a good idea.

As for grounding, that case itself, is sitting on top of a piece of wood with rubber legs. It's black so it may not be visible from the pictures. You can kind of see it in this picture.
Notice the silver computer's height is far higher than the white one. The silver one is the one with the problems.

I wish they would hurry up with making AMD 8 core motherboards, then I would just upgrade :).

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When was the last servicing done?

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

When was the last time you had your PC serviced? When dust builds up on components like capacitors, this may cause those component to fail in the long run.Use a can of compressed air to carefully **** around circuit components like capacitors especially those located within the power supply unit.
Please do not touch any internal components unless of course you are wearing an ESD wrist strap.
If this does not help, then you might consider replacing the power supply unit.
At this point the automatic restart issue should be a thing of the past.

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Reponse To Answer

by Slayer_ In reply to When was the last servici ...

I last blew it out about 2 years ago. Visual inspection shows it to be pretty clean. I didn't know dust in the capacitors could cause problems, when I think back to my first computer, with the huge clump of dust stuck in the fan slowly spinning...

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Just a thought here

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

Is the Monitor and Computer Case plugged into the Same Power Strip?

If it is try swapping the leads over the One to the Monitor plugged into the one where the computer is plugged in and the one from the computer plugged into the socket where the Monitor was.

Now if the Monitor starts turning on and off you know you have a Bad Socket on the Power Strip.

Could also work if they are on different Power Strips but it could just as easily be a faulty Power Strip as well.


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