You should open up the box and check if there's a lot of dust in it.
Sometimes it will build up and clog the vent holes on the sides of the
PSU. I've seen that more than once in these old machines, and it could
definitely lead to overheating.

cheers,
Anders


--
This cool Mail was sent on Wed 02/25/04 at 0:19AM PST


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* AHS Geoteknik
* Anders Hogrelius       Phone : +46 (0)70 6770210
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* SWEDEN

On Wed, 25 Feb 2004, Guo-Rong Koh wrote:

> Hi,
>
> Just decided to catch up with NetBSD pmax again only to find my DECStation's
> power supply is doing funny stuff.
>
> Has anyone experienced a DECStation randomly losing power without warning?
> It has occurred a few times now, once during the initial disk partitioning and
> again during kernel compilation.
>
> The system simply powers off, almost like a power save mode. The power switch is
> still in the on position and when switched off takes some time before it will
> power on again.
> It seems like some sort of overheat protection mode, but I can't find any
> information related to it ... and it's not that hot here.
>
> Any hints greatly appreciated.
>
> Thanks,
> Guo-Rong
>