QT10 Mazatrol T-Plus

Started with "10 overheat" but machine had not even been running. In fact shop is cold.

Replaced QX539 - No joy.

Fiddled around (fans, reset NC boards, remove plugs from QX587 and QX521 one at a time) and now have error code "350 operating switch fault"

Have a QX141 waiting to install but we are hesitent at this point to tear into the QX141.

Have 24v at NC power board. Drives show general E stop condition.