New update on this.
Background: The previous owner replaced the large 15000uf filter caps, and still had reset issues. Very intermittent
Heres what I did:
-I tested the BR's and the filter caps, all tested fine
-I replaced the C96 capacitor (you should test yours, this could be the root cause)
- I replaced the LT1084 voltage regulator - still did not fix, and cause more problems
Resolution/Workaround:
- I ended up removing the LT1084 and R408 and R409 resistors, and installing a 5v linear power supply with a molex connector on J3 on the driver board. Power supply plugs into the service box in the cabinet. I keep the cabinet on switch engaged and turn on/off the machine with a power bar.
The game has absolutely no resets now and plays great. I know there are people that frown upon these fixes but replacement boards are very hard to come by and Clive from coin op cauldron mentioned servicing these boards can cost alot! Also, spare parts australia has quite a few boards that are returned and likely not working.
If you don't want to do what I did - I would suggest sending your board to Clive and just eat the cost