Usually manufacturers declare the warranty to be void if the case was opened by people other than their own staff. If you want to try it anyway you may find some interesting links about how to repair, disassemble, upgrade or mod laptops or notebooks, repair broken PDAs and HandHelds, as well as repair mobile (cellular) phones, repair portable audio and video players, repair, clean and mod a computer mouse, repair printers, ink and toner cartridges, repair hard disk drives, repair and clean computer keyboards and repair personal computers - PCs.
BTW: here are some non-computer related links to guides explaining, how to repair (digital) cameras, repair cars.