A bit of progress on this machine.
I have totally rebuilt the power supply (only a few 1/4 watt resistors and ceramic caps were not changed.
The MPU had some minor acid damage and was missing one of the ram chips.
Acid damage has been repaired and new ram installed.
The MPU now boots, only 2 of the 6 displays work. (one display shows 0000 and the other display alternates between 66 and 11)
3 of the 4 displays that are not working have a burnt resistor.
I have replaced the burnt resistors but still no life in 4 of the displays (tested one the glasses in a working display and glass was fine so fault resides in electronic components and not glass in at least one of the displays)
