I've been working on a Flight 2k and I need help. When I bought it, I took an Ultimate MPU board over and it booted right up so I bought it. Then it started resetting constantly. Since then I have replaced the Power Driver board, the rectifier board, and replaced every connector in it, and recapped the sound boards. Still getting reboot. Every now and again, it will boot a game, but on the displays, only the 3rd player shows anything and it shows
_ 0 , 0 0 (dashes represent blank digits) and shortly after it resets.

I've tried 3 different MPUs and 3 different power supplies. Depending what power driver board is in, I'm either getting 4.9vdc or up to 5.2vdc on the MPU board. I've tried disconnecting sound boards and light boards with no changes in behavior.

It mostly doesn't even get to attract mode, when you turn it on, it flashes 7 times then beeps then starts the count over again. Every now and again, maybe once every 20 30 times I turn it on, it will get to attract mode then let me credit a game and when I hit start button it resets again.

I do not have a wire on Pin 13 at J4. I always take photos of the wires before rebuilding them. This is the original photo. Pin 14 should be the key that you see. (Before anyone comments, yes there is a loose connector in the original photo, these have since been rebuilt)

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I actually got the game to quit resetting. I did that by swapping the SB300 board from another game, so I know that's my culprit. I guess the call kit I did on it didn't work.

I'm still getting the weird display issue and only the flipper coils work. All fuses are good.

Ok coils working now. It was a crappy fuse clip under the playfield.

Now I'm down to just the weird display issue.

Finally got it. The 5v on the player 3 is the first of the daisy chain. Rebuilding that connector for that fixed. Then it still had all those weird zeros on it. To fix that, I had to clear the MPU memory. Now we are good. Just need to get a couple of switches and coils working right.

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