|
If you suspect that the hard drive is bad, then try replacing the hard drive - even if the old one tests good. The 'Peer Guardian' software loads REALLY early in the start sequence. Is there a possibility that you could uninstall that, and test your system for a few days?
Some other things that could cause a random shut down:
Faulty battery, along with a faulty internal battery connector.
Faulty left I/O board (where your magsafe connector is found.)
Overheating, or failed temp sensors on the logic board.
Overheating because the logic board heat sink material is faulty, which means a major job just to check out.
A couple of those can be checked at an Apple service shop, who will have the Apple Service Diagnostics that can fully test the hardware. It's a more comprehensive set of tests than those that come with the system originally.
__________________
Serendipity is a lucky guess !
|