I have a JackBot that won't boot. The driver board came to me with a bad BR1 and BR2. I had those replaced and some traces cleaned up by a highly skilled hobbyist. The machine boots with a known good driver board, but with my driver board, it won't boot.

I've tested TP2 and it has five volts. TP3 has 12 volts. I'm not sure what TP4 is supposed to read. I've also confirmed that five volts is coming out of J114 and into the CPU board.

To start, what are the minimum connections on the driver board and the CPU board that I need in order for the CPU to boot, and what combination of flashing LEDs and voltage readings should I look for?

I was missing one of the secondary connections from the transformer on one of the hojillion connections on the driver board. Thanks!