Picked us a black pyramid and put the mpu on the bench. Missing flashes, replaced the 6800p and ended up with a full 6 flashes. Next rebuild rectifier board, turned on and F3 blew. Disconnected Soundboard, replaced fuse and MPU shows only 3 flashes. Pulled MPU and back on bench gets 6 flashes. Put the mpu back in the back box, powered up... 3 flashes. Checked test points on MPU and found 5v spot on, and 12v was actually 14vdc. Any ideas what’s going on here?
Any help is appreciated.