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Computer freezes and screen pixelates

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#1 DebraJess


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Posted 27 April 2009 - 09:03 PM

I own a Dell XPS 420 with an Invidia G-force 8800 graphics card. I run Windows Vista and I've owned the computer for 14 months. For the past week or so, whenever I try to use the computer, i.e. surfing the web or playing City of Heroes, my computer screen will freeze and pixelate. I'm not 100% sure this is a hardware problem, so I would like to find out if it's just a part that needs to be replaced or if I need to reinstall my software.

Thank you!

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#2 fairjoeblue


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Posted 27 April 2009 - 10:49 PM

Should be either a memory or video card issue.

You can test the system memnory with Memtest86,


Unzip the ISO file
Use a program like Nero with the "Burn Image to disk" feature to make a disk from the isp.

If you don't have a burning program that will do ISO files download ISOrecorder


You can install it then right click on the ISO file & click on Copy image to CD to make the disk.

Boot the disk & let the test run all the way through [I think the are 8 tests] at least once.
If you get ANY errors you have bad system memory.
If you get no errors more then likely the problem is the video card.
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#3 DebraJess

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Posted 28 April 2009 - 08:31 AM

Thank you for the detailed response! I will try your instructions and see what happens


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