I do not claim to be a computer parts repair expert by any means, however, I will try to provide some helpful advice. First and foremost, if you are needing something like a monitor or television to be repaired then DO NOT try to open it up and repair it yourself. Chances are you will do more harm than good. Don’t justify trying by telling yourself that it is already broken because what most people do not know is how some of the older monitors and televsion sets can maintain an electrical charge large enough to put you on your back. Refer to a television or monitor repair specialist for that sort of work.

With that out of the way I will give you a basic knowledge of what you need to do before attempting to destroy…I mean fix your computer. Computers are very sensitive to ESD (electro static discharge) so please make sure to ground yourself before ever touching anything inside of your computer. The easiest way to ground yourself is to touch the metal from of the computer before you do anything. The next best advice I can give is to never touch the part of the hard that connects up to the motherboard. This applies especially to devices like RAM or expansion card pins. Most of the damage you can do to your computer is from ESD so I will try to not sound repetitive.  It would even be a good idea to wear an antistatic wristband that is grounded if you have it. Never blow into PC to remove dust. Use some compressed air that you can buy cheap at a local Wally World (again for static reasons).  

Pretty much the only tools you need for repairing your computer are some screw drivers and a sledge hammer and/or axe (just kidding!).  Your motherboard documentation should have almost everything you need to know about where everything is located and how to remove and install it.