PDP-11/44 problem - RUN stays on

Ethan Dicks ethan.dicks at gmail.com
Thu Nov 9 16:13:26 CST 2006

On 11/10/06, Don North <ak6dn at mindspring.com> wrote:
> I know back at DEC when we had a unibus CPU problem, the first thing we
> almost always did was pull the boards, run the trusty eraser up and down
> the fingers, and then seat/reseat the boards a couple of times. This
> invariably worked.

When I did support for Unibus and Qbus COMBOARDs, our first
recommendation to our customers with hardware problems was to reseat
the COMBOARD.  That took care of 90%+ of calls (and we didn't have to
ship replacement hardware).


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