Just picked this up off CL. Game boots to pictured test screen. UJ4 box turns red, the game goes to Revision 3.1 screen, then blank screen. Is this as simple as replacing UJ4?
UJ4 is most likely not bad. It's either going to be an open trace, lifted trace, lifted leg, or contaminates in the legs causing a short. Visually inspect the chip for any of the above issues and report back.
UJ4 is most likely not bad. It's either going to be an open trace, lifted trace, lifted leg, or contaminates in the legs causing a short. Visually inspect the chip for any of the above issues and report back.
No. One is connected to the +5V supply (DS2) and should be always on, the other is a status LED (DS3) that IIRC flashes during the attract mode and game.