hey there. i am in moline. i am working on a operation thunder. alpha numeric. my board is deAD. got it in the bunch now testing what chips i cAN WITH LOGIC Probe. if i am reading it correct, so far i have a bad u10, u14, u15, maybe one bad u21, perhaps bad U5, BUT DONT HAVE info to verify readings,, u 11 seems to be in spec. put in a brand new u3 with a 28 pin and jumper swap getting rid of the 24 pin.
board on bench almost seemed like it wanted to boot with the 24 pin u3 but no dice in game.
just solid red light on the board