Megasquirt stoped turning on.
 

Car 93 LE
Ran perfectly fine. Pretty much stock, (air filter, bracing). Today I wire in the lc-1 and megasquirt 1 pnp. Get it all together and put the battery back in the car it take the megasquirt a lil bit to turn on. Had to secure the battery cable and it kicked on. Turned the car on and off multiple times calibrating the wideband and getting everythign set in the ecu and that. After about 20 min time I had shut the car off again and it wont turn back on. Of couse it is a used ECU. Was in perfect working order and know the car it came off of. I checked all the grounds and the clips. Everythign is good. I pulle dthe megasquirt out and put it in my 91 miata that has a ms2pnp and it will not power up in that car either. So I know it is an ECU issue.

What pins on the ecu do I need to shoot to see about power or to test it and see what the issue is? I have read a lot about people that built ecu's and jumping wires and buring up things. Ecu smells fine and I pulled the cover and it all looks good.

Check to see if the MSPNP has 12 volts on the S12 hole on the main board.