For info:
This set was cured by changing main pcb. Dissapointed to find that the board is virtually impossible to repair but at £35.00 (eventually) it was worth it. Very good when working.
I noticed the main proc has a heat condutor pad to the main chassis for cooling so an extra spread of heat compound might be wise.
So guys. If you see one of these with no power you know what to do.
G