Alright guys, So needing some guidance. Williams Fire! did a flipper rebuild, basic top side teardown and shop. Added a cointaker LED kit and now the game is having issues. Here are the symptoms:
-Game boots fine but randomly mid game it will just reset. Not always but id say every third game, but sometimes any game
-Reset once and gave the "MemProt Failure" message
-Sometimes it seems like the multiball sequence gets messed up and it decides to dropped locked balls when it feels like it.
-Game only did this once, but it seemed to lock up and the left lower sling shot kicked on and stayed on. I immediately powered off the game.
-Game has memory and maintains the freeplay setting when powered off
Recent things I have done to try to correct/troubleshoot the issue:
-When I brought the game home I found corrosion on the battery holder and replaced it with a remote mount. I can measure 4.5 volts at the board on terminals using B1+ and B3-
- Removed MPU board and reflowed all pins for the molex connectors.
- Checked power from the power board TP1=+4.97, TP3=+12.42 TP4=-14.54
- Ran CPU test with coin door open = LED indicator at U46 shows what looks like a zero,but half of it flashes in and out like a 7 almost??? When you first press the test button the U46 display briefly lights dimmly for a split second then the game seems to boot right up and do the 0/7 thing.
-Coil test runs fine with no issues or resets
-Switch test looks good with no unexpected closes on switches
-Coil door memory switch tests good
I am wondering if I am dropping power during play from the power supply causing a reset??? I am going to pull it out next and check for cold solder joints. Was thinking a cap kit, but the board looks like it has seen better days and thought of going to an Xpin replacement board. Think i'm chasing the right direction or possibly something else? Any suggestions or help would be appreciated.