George, yes all the lights and smoke are functional. Of the power supply boards, one had the op-amp dead, that brought that one back to life. , the other P/S board was toasted, Q22 had literally melted down and destroyed the traces in that area, almost burning through the board, so that one is gone. The speed control could be bad on that one as well, I'll never know and it didn't do anything on the boards when I got it. Q22 is also an obsolete part that I couldn't find a cross reference for, even if it hadn't cooked the board.
I found it odd that both processors had the identical failure, but I'm thinking that maybe he swapped things around and the failure affected both boards. Q22 was curious on the one P/S board, that being associated with the battery circuit. Perhaps that was a different failure cause. Truthfully, when the relay doesn't operate, usually the board doesn't respond as well, at least in my experience.
The relays are good, I tested it with an external supply and the contacts switch as they should with the relay energized. I don't see any cooked traces anywhere visible, though it appears some of them would be under the relay.
The "thinks it's in reverse" was referring to the fact that the motor always runs forward, even though the lights say I'm in reverse. Obviously, the relay not operating is why that's happening.
What buffer connects to that FET? I don't see a buffer in that area of the board, is it one of the '244 chips at the other end? I was thinking they might be driving it direct from the processor.
