In article ,
Tim Downie wrote:
If it was something overheating it would more likely crash than switch
itself off,. Same goes for memory faults.

In my experience, a sudden switch-off is quite common with processor
over-heating so don't rule it out.

It can happen seconds after a cold start. And the machine is well cooled,
with the correct fan on the processor which is working normally. Thing is
sometimes the PC is in use all day without problems.

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Dave Plowman London SW
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