Mine shows no signs of life when pressing the power on button. The power supply is good - it will start up a PB160, for example, so it is not the problem.
I may have a spare logic board from a 145b here in a box of parts, so when I get “a round tuit,” I’ll probably try that. It would be less work than fiddling with the fuse.
Was the fuse your problem or that cable you mention?