At times when the ball goes in the shark hole, the coil does not fire until I press the left flipper. Also, the ball will go in the shark hole and not come out and the lock trap to under playfield ramp gets locked on. I have to power the game off at that point. Other times the lock trap locks on when I start a game. Both coils work fine in test mode. Any ideas? Any help would be greatly appreciated.

Anybody? It has a new power supply so its not that.

I have had it for a couple of months. When I first got it, there was a lot of blown fuses. It had that problem when I got it. I shopped it and thought the upper gate was the problem because I had everything working for a month other than when the ball went into the shark hole, it fired most of the time but I had to flip the flipper button for it to fire some of the time.

All switches work in test mode. I took a good look at the cpu and the transistor for Q54 has a loose leg so going to check it and solder it back on properly now and will update.

ok, I took the cpu board off and the middle leg of the Q54 transistor and it somebody had taken the middle leg of the transistor and had it jumpered to one of the little things above it on the top side of the board, I think R103 but it had become loose. I put the middle leg back in the hole and now all the switched in the column associated with Q54 do not work although the coils do not lock on, all coils work and all other switches work. The transistor tests good so should I jumper it beneath the playfield with a wire? If so, to R103?

I took the board back off and Q54 is actually traced to c80. Which leg of the transistor should I jumper to which leg of c80?

I edited the topic since I found its actually a switch transistor problem.

Thanks for the diagram zaza. Should I jumper the middle leg to R104?

I jumpered that wire and all seems to be working properly now. Thanks to all for now. Only problem I still have is that shark hole switch does not register every time. I think that the left upper flipper firing causes enough vibration to make it register.