Hi. Some years ago I got a Pismo 400 from a friend that worked in a used computer warehouse: he told me he didn't have time to check it properly, but at least it was booting and working. I just installed OS X Panther and everything was going fine, when suddenly I heard an awful noise from the speakers: I turned it off immediately, but after that I was unable to get it to work again. Once in a while it chimes, the HD starts, then there's a beep sequence (I guess it means he can't find any RAM) but most of the times it just emits a feeble "pop" through the speakers, the HD doesn't start and the processor begins to get very hot. I cleaned and thoroughly checked the processor and logic board sockets - I read that's often the culprit of such issues - and they seem in good shape, but I can't get it started. Any suggestion? Thanks in advance.