Hard ware problems

Via technologies, inc. / Via
February 24, 2009 at 05:43:31
Specs: Windows XP, P4,760MB
I have been getting problem since yesterday on my p-4 desktop.motherboard is Via,1gb sdram.
It is rebooting itself when ,
1- i go to one application from other,
2- transfer files from cd ram to desktop,
3- transfer file from usb to desktop.
4- making a copy on cd writer.
5- it just go and reboot itself,while working on pc.
I have formatted hard disk a few times and installed windows xp .had same problem.I di virus and antispy,rootkit scan three times.ok.I changed mouse,key board,sdram,but no difference??
then formatted and installed windows 2000 with service pack same problem.
I was told this is due to either drivers or hard disk or penitium processor or usb ports????
I have to buy the defective part so wanna know what part is giving this problem to buy.thanks

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February 24, 2009 at 06:09:13
Of the things you mention they are the least likely culprits.

The most likely culprit is a failing power supply. This should be the first thing to check either with a known good power supply or a new one. The power supply is the easiest component to replace and the cheapest.

After that the RAM could be the problem. This can be checked out with Memtest 86. Download an run this, overnight if necessary and that will root out any memory problems.


The next thing to check is the hard disk. go to the manufacturers web site and download their disk diagnostic and run that. That will root out any problems with the hard disk.

It is extremely rare for a processor to fail in service unless it has been abused, usually by overheating.

Faulty driver don't normally cause a reboot, usually a blue screen of death. To eliminate that make sure you have your computer configured not to automatically restart on failure. Do that from System Properties > Start up and recovery and make sure Automatically Restart is un-clicked. Then you should get a BSOD which will give you an indication of what the problem is.


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February 24, 2009 at 09:06:49
Thank you for valuable tips.
First of all I wanna check and replace power supply.
Please let me know how can i check the power in my pc manually and do i need to replace if faulty??
How will I replace with a new power supply??
From where i get a power supply set??

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February 24, 2009 at 09:33:13
Run the memory test as your first troubleshooting item. That is more likely than the power supply. There is no way for you to test your power supply. That is why StuartS stated you would need to try a known good PSU.

A good PSU might cost at least $50. Your memory is probably warrantied for life.

One thing you can do to check the PSU is to boot into the BIOS (setup) screens and go to PC Health. You should see some voltage readings. Look at the +12V, 5V, 3.3V. Those actual numbers should be close to the theoretical values.

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Related Solutions

February 24, 2009 at 09:40:41
There is not much you can do to check the power supply. You can put a voltmeter on it but all that will do is tell you what you already know, that is is possibly working. You need specialist equipment to test it under load and make sure it is working perfectly.

You can get a power supply from almost any computer retailer, they are easy to find. But if you don't know what you are looking for it is very easy to get the wrong type. Best take the old one out and take it along to a retailer who will supply you with one the same or similar.

It is easy to remove. Just disconnect all the cables making a note of what goes where and then unscrew four screws from the back of the case then it comes out.

But first I would check the memory and hard disk first. You can do that without spending any money.


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March 3, 2009 at 04:29:43
I rebooted the Bios twice .I also disabled the auto reboot .
Thank you very much for all your nice advices.I checked hard drsk,ddr ram,modem chip,mouse,key board,processor,heat sink and power supply ,using an other desktop parts and found all these parts to be working.I have geniune driver cd(came with pc) and installed driver from their.But problem exist.Now when i install win xo it stop when it reach to 39 percent installation.Is any thing wrong with mother board.How can i fix it???
I wanna know what is mobo chipset and how I use it???

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March 3, 2009 at 05:08:37
"ddr ram,modem chip,mouse,key board,processor,heat sink and power supply ,using an other desktop parts".

You need to run memtest86 on the memory.

Visually inspect the motherboard. Look for leaking or bulging capacitors or any discolored or burned areas.

Run a hard drive fitness test on the drive. Download the test from the drive manufacturer's website.

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