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MacBook (13"): Suddenly shutting down
Several readers are reporting an issue where the MacBook (13") suddenly shuts down in the middle of normal operation. This is an issue we covered in our MacBook special report, and attributed to bad RAM, but it now appears that other causes are at play.
Usual suspects for this type of issue are corrupt PRAM, improperly seated or bad RAM, or a problematic PMU. However, users have yet to find relief from the symptom with these traditional workarounds. Diagnostics performed using the Apple Hardware Test CD have also failed to yield conclusive evidence of component failure.
Some clues point to overheating, though we certainly can't say that such is the cause in some, let alone a majority of sudden shutdown cases.
It appears that affected units have flawed logic boards, which are being replaced on a case-by-case basis.
If you are experiencing a similar issue, please let us know.
For more, see our MacBook (13") special report.
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