The power supply modules are all back in the mounting box with the transformer and this is reattached to the chassis.
I powered up the machine from the front panel on the weekend. This machine is equipped with a KY11-LB programmers console which connects to an M7859 Quad board in the backplane (interestingly this board is run by an Intel 8008 microprocessor).
When powered up the programmers console display came up with 000000 and the run light was lit. Some of the keypad buttons are stuck or give the wrong value when pressed so I need to pull that apart and find out what is going on there. Hopefully just something stuck behind the panel. Using the keys that do work I was able to load an address into the Address register on the board and read it back which suggests the M7859 is generally working.
At the moment I am stuck with a Bus Error when I try to halt the CPU.
This generally means the Grant cards are not correctly installed but these are OK so it may be time to get the logic analyser out and start looking at the backplane. Before I leap into that I will look further at the front panel. It might also be the front panel buttons mean something other than HALT is being pressed.