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').

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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