PC turning off and on at startup

January 1, 2009 at 04:46:57
Specs: Windows xp, intel 552
The pc got switched off at the mains in error. When it was switched on again it started up and immediately crashed, then started up and crashed. It now keeps going on like this.

I changed the battery and cleaned it out. The CMOS settings had reverted back to 2002. I managed to change them to real time but when I clicked save and exit, the pc just went back to it's start up, switch off mode again and the settings were lost.

I've noticed the battery light keeps coming on and I've now replaced it twice, but to no avail.

The repair place isn't open until 6th and kids come back on the 5th.

Any Thoughts please?


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January 1, 2009 at 05:13:03
i'm not sure what's happening and this is just my guess

it seems that your system is most probably corupted when you turned of the mains (maybe the com was accessing a system file at that time). have you tried starting up in safe mode? if it still crashes, try booting the computer with your OS cd or boot disk in your com, then reinstall the os.

hope it helps ;)

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January 1, 2009 at 06:49:21
As les says, can you boot into Safe Mode? You could always try Recovery Console and run chkdsk.

Do you not know what brand your own computer is? Is it a desktop or laptop?

What battery light are you referring to? I wouldn't reinstall unless absolutely necessary.

"So won’t you give this man his wings
What a shame
To have to beg you to see
We’re not all the same
What a shame" - Shinedown

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January 1, 2009 at 06:52:26
Addressing the CMOS settings. If you accidentally installed the battery up side down it won't hold the settings. If you have the clear CMOS jumper in the clear position instead of the run position you can damage the motherboard.

The original problem usually sorts itself out after one of two boot cycles.

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Related Solutions

January 1, 2009 at 07:23:36
If the computer is starting up and then shutting off and starting up without pushing the button, then it might be a faulty switch. I had the same problem and finally traced it to the wiring connected to the switch. Try taking the front panel off and move the wires to the switch and see what happens. I ended up taping the wires together and that seems to work.

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January 1, 2009 at 11:39:44
It's a desktop and it can't be the switch because if I'm quick enough on pushing F5 it will display the page with safe mode on it. And it will stay there until I click on something, like safe mode, then it goes into it's ridiculous sequence of stop start again.

What I think is the battery light, because it seems to have a battery symbol below it, is situated next to another light that has a light bulb symbol.

Now I've noticed the CMOS is displaying the correct time and date. A bit puzzling.


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January 1, 2009 at 11:48:12
When an ATX PSU is connected to the mains the motherboard always has some power. That will hold the settings even without any CMOS battery installed.

When you reset the date & time you needed to reset other values too. If nothing else set to optmimized settings for each screen. Reset the boot order to.

The above may not be the cause of the current restarts but needs attention anyway.

"then it goes into it's ridiculous sequence of stop start again". Can you give any more detail to the above quote?

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January 1, 2009 at 12:49:28
"then it goes into it's ridiculous sequence of stop start again". Can you give any more detail to the above quote?

It starts and then almost immediately reboots unless I push F5.

I also tried starting it with the OS disc. That takes me to a blue, intel, pentium 4 page, then to a black screen with a blinking cursor. This cursor jumps down a line. Then it shuts down again.


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January 1, 2009 at 13:19:06
When it reboots what do you see on the screen? Any blue screens flash by?

When first starting the computer do you see any hardware configuration messages on the screens prior to Windows starting?

You can use the Scroll Lock key to freeze the screen at any point. Tapping the spacebar will restart the process. Repeat as needed.

Also boot into the BIOS screens and go to PC Health. Look at the information there. There may be a setting to shutdown the computer at a certain temperature. There should also be system and CPU temperature reading there and voltage readings. Write them all down and post here.

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January 1, 2009 at 15:19:23
try booting to a livecd, if it boots to the livecd and works without problems then windows got corrupted.

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January 2, 2009 at 16:32:26
I have just gone thru the same thing trying to repair a Dell Deminsion.All it does is reboot and I am convinced it is the mainboard. I tried a new power supply,memory,hard drive, video card and took out all the other PCI cards to eliminate conflicts and it even reboots using norton boot cd.

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January 2, 2009 at 23:48:00
I found F10 worked and from there managed to reload xp which has solved the problem.

Now I have to work out why I've lost sound (no audio device) and why I couldn't use the ethernet cable to reload the isp disc. Had to revert to usb. Also need to work out where the kids have lost the wireless adapter.

Thanks all for your help and suggestions and hope you have a good year.


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