Please help - computer turns off randomly
I purchased my computer in the US in september - right before I moved to London. Mid november it died. The computer would turn on and chime, but the screen was dead. I took it to a 3rd party repair (which apple phone tech support insisted was just as good as the apple store) and they replaced the logic board. It all seemed fine until I took it home and used ichat video with my family - the computer turned off. It didn't shut down, just seemed to pause and go dead. I could reboot it and it had no recollection of incorrect shutdown with the exception of firefox. (I dont know if this is important, but every time it does this and i reboot, the sound resets to mute) I started to notice that the computer does this any time I use video functions for an extended period of time (or at least 20 minutes). I have brought it to the apple store twice, where they have repaired it twice. I have gone through at least one more logic board, a heat sink, something to do with the power adapter, as well as the battery. They cannot find anything wrong - 3 repairs later its still shutting down so I went to apple again. Unwilling to give up my computer YET again, they recommended I archive and install. I have now done that - now my computer is crawling - still crashing - and some programs decide to open up occasionally or start and stop without a crash notice. I tried to run disk utility and it froze. On top of this all, they recommended I download xslimmer to convert old power pc programs to the current intel format I'm running on my new macbook - this seems to have complicated things more. I asked them to replace the computer during my last genius bar visit, i was told that because my computer was purchased in the states they cannot replace it, and I will not be heading back to the states soon enough to have it replaced there. So anyone with any insight, please help! I bought a new computer so i wouldn't have to deal with these problems and its turning out to be more of a headache than my old powerbook g4.
I also forgot to mention that every 45-60 seconds there are two faint tick sounds coming from inside the computer.
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