Question about Dell OptiPlex GX260 PC Desktop

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My pc will reboot itself without warning


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  • planwithurie Jan 18, 2009

    I don't have any more info. The unit will be operationing fine. It may run well for weeks at a time, then suddenly will reboot without warning.

  • Subin Joseph May 11, 2010

    There are dozens of reasons this might be happening. OS? Connected
    devices? Software installed? Virus? Driver issue? Hardware problem? memory problum

    Provide some information about your system.

  • Dick
    Dick May 11, 2010

    There are dozens of reasons this might be happening. OS? Connected devices? Software installed? Virus? Driver issue? Hardware problem?

    Provide some information about your system.


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  • 54 Answers

While this could be a software problem, The most probable culprit is a bad memory chip, you can google "Microsoft memory tester" and download the disk image from microsoft and burn to a cd to test the memory yourself.

I have also seen a lot of dells do this due to faulty capacitors on the motherboard, a quick visual inspection (just open er up and look closely at all the capacitors) should be able to give you an idea if this is the case.

You will see bulging or leaking capacitors if this is tha case, which would require replacing the motherboard in most cases.

You may want to consider bringing the PC in to a local repair shop if you are still unable to diagnose the problem yourself as these kinds of problems can be difficult for the average user to diagnose.

Posted on Jan 19, 2009

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To start with, you should check all your hardware. A loose connection somewhere or a faulty piece of hardware could be the reason, the computer keeps rebooting itself. In case your RAM stick is not fitted properly, or is corrupt, the computer displays an error message on the screen and keeps rebooting itself. The same problem occurs with a hard disk. You can use 'Memtest86' to run a hard drive check.

You may at times come across an error message on your screen, like a system failure error, before rebooting by itself. There is a particular solution to this type of problem. You should first go to the My Computer icon and right click on it. Select properties, and a window will appear on your screen. Click Advanced tab → Start Up and Recovery → Settings. After clicking the settings option, you will have to uncheck the box next to Automatically Restart. Click OK twice. This will prevent the computer from rebooting itself and you can redress the issue.

A different way to tackle the problem of 'computer keeps rebooting itself', would be to restart your computer in the Safe Mode. Allow the computer to boot fully and let your windows operating system load fully. Now, if your computer keeps rebooting itself even in the safe mode, there is a problem either with the operating system or hardware. And if your computer is not rebooting itself in safe mode, the problem is related to certain software.

Over heating is another reason why your computer keeps rebooting itself. Not many people pay attention to this aspect though. The fan responsible for keeping the CPU cool, may be malfunctioning or there could be dirt settled between the fan and CPU. Any one of these could be the reason for your problem. Either clean the fan area, or replace it if necessary. Try providing proper ventilation for your CPU, so that it stays as cool as possible.

You computer could reboot on it's own if you have installed improper drivers. Right click on the 'My Computer' icon, and click on 'Properties' from the menu list which appears. A new window will open. Select the 'Hardware' tab, and click on 'Device Manager'. A list will be displayed on the screen in which you will have to check all categories. Is you see any red or yellow warning icons, make sure you update that particular driver from the internet.

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This may sound silly, but check the power cord is plugged in hard to the socket at each end. I once made a service call to a computer which wasn't plugged in correctly, and was resetting.

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