KDJ-11A won't run

From: Gordon JC Pearce <gordonjcp_at_gjcp.net>
Date: Tue Jan 13 06:10:32 2004

Hi there,
  I'm working on what I am led to believe is a PDP-11/73 (but it doesn't
look like one). It *was* working last week, but one of the leads had
dropped off the console socket on the back. On resoldering, it worked
perfectly.

  Last night, when I opened it to fit the RXV21 another lead dropped of
(RXD this time), so again, I resoldered it. I don't think this has much
to do with the problem.

 When I power the machine up, the 2nd-from-right status LED lights up.
>From googling, it seems this means "SLU Error". The Run light on the
front panel comes on for a moment, then goes back out. The green LED on
the KDJ-11A never comes on (but I'm not sure that it ever did). All the
cards are firmly seated.

  Unfortunately I don't have a list of all the cards fitted to hand.
>From memory it is (might help to read this in a monospace font):
| M8192 | Serial? |
| full width memory card |
| RL02 Controller |
| ST506 | Console/ROM |
| M8029 | |

Can't remember exactly, or quite what the cards are (some seem to be
third party).

One - does this seem to be a sane layout of cards (modulo uncertainty on
my part); and
Two - What would cause my SLU Error, and how should I proceed?

Thanks in advance,
  Gordon Pearce
Received on Tue Jan 13 2004 - 06:10:32 GMT