Click start control panel administrive tools computer management device manager scroll to display adapters + to expand you might see a yellow question mark ? or exclamation mark ! or a red x right click select reinstall drivers
If your computer came with a motherboard disc the drivers could be on it
Want to make sure your drivers are in place and no errors have occurred? Simply click start right click on my computer select properties then select device manager scroll to Display Adapters and click on the small "+" you should see the model of your PCI Express graphic card there. If there is a problem with it, a yellow exclamation mark should appear besides it. If you don
Test your PSU or replace it if your power supply units fan is not working your PSU is faulty
One bad lead can cause a computer to continue on a cycle or to shutdown or fail to detect/ boot up a computer hard drive
Test all leads that attach to your hard drive including electrical extensions,IDE,SATA
the leads from your ((motherboard to your hard drive)) make sure they have a secure connection and are not faulty or just replace them there probably old and faulty make sure all leads that are attached to your drives dvd\cd 3 1/2 inch floppy have secure connections and are not faulty even the electrical extensions or just replace them they are probably old and faulty a computer needs its connections to have an end so any faulty leads will end up with a computer error hope you find this helpfull
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