HP8562A Keyboard Repair

 HP8562A Spectrum Analyzer Keyboard tear down and repair

It's Ekka Wednesday on a cold wet Brisbane day and what better to do that to get the girlfriend to dismantle a spectrum analyser.

PROBLEM
the 0 and 1 keys basically don't work and other keys are difficult.  

The one on the left has a dodgy keyboard.
The one on the right displays ERR317 and ERR344.
PLAN A is to clean the contacts on the first unit and then fix the right unit.
PLAN B is to swap the right keyboard to the left.

1 REMOVE OUTER COVER
At the