I'm working on an IGT Red white and blue machine that came in basically dead. The machine had been in a storage unit for 6 years waiting to be worked on. The bottom 8am fuse in the power supply was blown. I replaced that and started the machine up.
It threw the low battery tilt error. I installed a battery pack to replace the old cell. Managed to do a clear with an IVC123 chip. When I went on to run the set chip set015 the winner paid display flashes numbers, credit window blank, and sometimes the coins played flashes 0 a couple times and goes out.
For giggles, i put the game rom back in sp731. It came up with a 61 error that I was able to clear and the machine plays with the exception of the bill acceptor not working. The machine has a dbv200 in it, and I've verified that its all buttoned up tight.