Make sure you have a first aid box for the PC which has the following tools. You'll find most of them lying around the place.
o A Philips screwdriver to open the case and detach cards.
A clean lint-free cloth.
A soft-bristled brush.
A current detector which is usually a small screwdriver with a tiny bulb in its handle [also called a 'Tester').
o Spare power cable and a spare spike buster fuse.
Heat sink compound.
Don't be surprised, but you'll also need a pencil eraser. You'll soon know its purpose.
o And most importantly, patience and confidence I