Right here is all you need
Computer Repair with Diagnostic Flowcharts

http://www.fonerbooks.com/pcrepair.htm

But actually knowing what you are doing is the best trouble shooting out there.I...

Use the Start - turn off computer - turn off instead of pushing the power button to turn off.if you do use the power button hold it in a few seconds till you hear it completely shut down.also they...

Well first thing as rule of thumb is never install hardware with the machine on.

As far as your problem it has probably shorted out the MotherBoard.so in turn it could have shorted other...