[lcaillo]

How often does this happen?

 

[lcaillo]

Intermittent problems are typically due to bad solder connections, bad capacitors, or semiconductors that are failing. They can sometimes be isolated with heat or cooling of the affected circuits.

 

[lcaillo]

Without doing some research on the system, I cannot comment on the errors you are getting and their meaning. The only things that I recall causing shutdown on these units are leaky audio amp ICs, optocouplers in the PS, and filter caps in the PS.

 

[lcaillo]

Have you looked for the obvious, like checking for swollen caps or bad solder joints?

 

[lcaillo]

I can't think of a reason that a convergence problem would cause that symptom. More likely a different problem or something damaged when removing the boards.