My apologies to all if this subject has been covered ad nauseam. I did spend considerable time searching previous posts, but came up empty.
Symptoms: Bosch SHE/63 will not turn on, no panel lights
Diagnostics: ran through the troubleshooting guide listed in enclosed wiring schematic. With digital multimeter, determined have 110 to unit, and that main switch and interference suppressor both good. The existing K11 module looked functional upon a visual inspection of capacitors and resistors, and I could not see any burnt connections or loose wires anywhere else in the unit.
Repair attempts: punted and replaced main switch, door switch, and control module K11, none of which rectified the problem, of course.
Question: to prevent me drinking my own tears to stay hydrated, and preserve my marriage, what am I missing? The K12 control module is the only one I have yet to replace. Short of finding an answer here, that 12 pound sledgehammer in the garage might be the next tool I grab.

+1