Dell Optiplex GX270 spontaneously going into Sleep Mode

Dear Experts,

we have a Dell Optiplex GX270 that goes into sleep mode at random.
We are on the latest BIOS (A06) and the Power Settings are set to "Never" out of paranoia.

Any ideas, or is this just a duff machine?

Many thanks,

Who is Participating?
CallandorConnect With a Mentor Commented:
I would check the ACPI driver in device manager for a yellow exclamation mark, or even reinstall it.  Swap the power on/off switch with the reset button, in case it is intermittently making contact by itself.
edhastedAuthor Commented:
Many thanks for your advice and please accept the points.

If people have this problem in future other parts of the Internet indicate that the PSU can be the cause and swapping this out normally rectifies this problem.
We are awaiting a replacement and will now the answer for sure when it's been installed.

With many thnaks,

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