http://tuxmobil.org/disassembly_pda.html
Check out this site for a widely varying set of instructions for disassembling, modding, and repairing older PDAs including the ever-popular Apple Newton. Looks like this site is older and hasn't been updated in a long while. Several links appear to be dead, but others still link to some great info. Also available are
instructions on laptop disassembly.