PDP-11/94-E

[Jerry Weiss]

On Jun 1, 2016, at 8:39 AM, Jerry Weiss <jsw at ieee.org> wrote
> …..
> Have you checked the Unibus supply voltages?    
> …
>    
> 

As a rule-out make sure the Unibus cards are getting power correctly.   The Power Supply sounds like is fine and powering the QBus side of things, but if the connections to the Unibus backplane are wonky it might create symptom that the cards don’t exist.   Note: I’m not referring to the AC and DC LOW that Paul K mentioned earlier  (which also are good items to check), but just the raw power to the backplane.