Summit Autoslot - Multiple issues

[BigWick]

I have a Bally converted cabinet which I rebuilt the Autoslot CPU board on a few years ago after a bad battery leak and ended up stripping the board to replace over two dozen breaks, two IC's and and the output transistors for the display and dump/burn a copy of the EPROM. Initially it worked fine and I was getting activity out of the coin diverter, electronic counters, the hard counter and for a one-line nickel machine you could get it to pay out a few times in half an hour, even hit a jackpot so it was consistently entertaining to play. Then after a few weeks it seemed like the payout odds just suddenly sucked. You could put $20 in nickels into the thing and it would never pay out more than once, if at all. Likewise the electronic counters stopped and are stuck at 000 000 but the SRAM seems to be keeping its contents and game state on a power hit so it's not another bad chip or battery that I can tell.
The other less pressing issues is that the door switch tests fine but the CPU never detects the door as open (EG: pressing hopper and CPU reset on a coin tilt should hold the hopper until you you close the door but it doesn't and starts spilling nickels everywhere as soon as you reset) and while I have the service manual for the Autoslot conversion kit the wiring harness and terminals do not match the diagrams. Likewise a lot of the diagnostic information also does not match.
This unit has the I/O board with the solid-sate relays and not triacs. At least one has failed and been replaced so far in the hopper circuit.

[Paul]

This is the only place to get good knowable info on Summit slots.

http://www.hms-electronics.com/slot_machines/summit_systems_support.htm

[BigWick]

Yeah I read through that several times and tried inquiring for more info but he really wants me to pay for any kind of service or replacement. No casual chit-chat and what was written on the site did not cover the problems I was running into. My issue is that like with the manual a lot of the tilt codes and theory of operation do not match my machine, plus he only covers the triac driver board which I don't use. I'm getting pretty close to stripping the CPU board again and redoing my repairs which I guess is one way to spend an afternoon. :/

[BigWick]

Okay this got weird fast.

Remember how I said the door switch is seemingly ignored by the CPU and on a hopper reset it won't wait for the door to close before spitting coins out? Sure it beeped out fine but I didn't check if it was working with the door shut. 
I double checked the door switch adjustment and it had slipped back so the machine always thought the door was open. Still doesn't answer the hopper issue but once it was adjusted again both the electronic and mechanical meters started working again, the diverter began operating and the payout odds significantly improved. Christmas day was topped with a $200 jackpot! There's nothing in the HMS or the Summit troubleshooting information about this.
I verified the EPROM against a dump from several years ago and it still matches so it's not a case of bitrot during my ownership. Either something got lost before I could dump it and it can't properly "see" the door status anymore or this ROM load seemingly rigs the machine (you can drop in coins, play, lose and the machine doesn't count anything) if you keep the door switch in the open position.