OK I need some help i'm stumped.

All test point voltage readings are fine, but i'm still getting resets. Any idea on where to go from here? MPU has new pins connectors, SDB has new pins connectors, PSB under playfield has new pins connectors. It boots up, goes into attract mode, sometimes I can play it, but it still resets. Even pushing the credit button to put some credits up can cause it to reset. Where do i go??