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Post originale di: Dave Carpentier ,


Check on the inside surface of the front lower panel, and hopefully you will find a diagnostic/tech sheet that will allow troubleshooting of the control board (front panel board).

If a microswitch had gone bad, the computer will not allow any startup at all (appears dead at panel).

The diagnostic is easy with a regular ohmmeter. but you do need to completely remove the board.

If board is bad, replace ($300+), or if its just a microswitch.. remove and resolder a new one ( $0.50).

Good luck !

(btw, I posted why I think this is a design fault of the he3/4 line , and a workaround ,in one of my other posts)