Check power cord itself from wall to computer. http://www.ultimatepcrepair.com/files/outlet.mpg

Check Power Supply inside System Unit. http://www.ultimatepcrepair.com/files/powt.mpg

Replace Power Supply rather than trying to repair it. http://www.ultimatepcrepair.com/files/inspower.mpg

If system make those click noises,but screen is blank, check Monitor. http://www.ultimatepcrepair.com/files/mont.mpg

If monitor proves to be good,check Video Card,even in a new system. http://www.ultimatepcrepair.com/files/vid4.mpg

Another big headache you will most likely encounter if you're a regular user of your computer system,is fact that Windows will fail to load or system's POST will fail to run.Download file below to learn much more about Power On Self Test.Don't forget those preventive maintenance procedures that can be done often to keep your PC running at peek performance.

Running such Windows ultilities as Scandisk,Disk Defragment,and Disk Cleanup will help your computer performing at its best.Using a can of compressed air removes dust that could build to point of causing a short.

If you get computer to boot but it does not want to read from hard drive'the Master Boot Record on hard drive may be corrupted or even missing.To verify that master boot record has not been damaged...

Boot from floppy disk that contains FDISK program and type command " fdisk mbr " to restore master boot record onto your hard drive.

Otis F. Cooper is the author of the award winning PC Super Pack,the Computer Training By Video course.For hundreds more free PC repair tips,sign up for his bi-monthly newsletter and learn the PC free at http://www.ultimatepcrepair.com