From owner-freebsd-hardware@FreeBSD.ORG  Mon Mar  7 17:29:19 2005
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Date: Mon, 7 Mar 2005 17:29:17 +0000
From: Ben Haysom <ben.haysom@gmail.com>
To: freebsd-hardware@freebsd.org
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Subject: Unclean Reboot For No Apparent Reason
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Hi

A while ago I asked about my 5.3 machine which has taken to rebooting
itself during a full portupgrade.Doesn't shut down properly - just
resets.

I was advised to try a few things.

I've done memtest86 from CD, let it do 5 passes and it found no problems.
I unplugged both CDs and the Floppy, and tried it, but still did the same.
cpuburn seems fine.
doing mbmon whilst executing the portupgrade -a command shows the
temperature get to around 42.5 before it resets, but it can vary.

I'm stuck now... any ideas?
Ben Haysom