The OP had already purchased the replacement power board prior to the coil issue being discovered. That's my understanding.

I'm interested to know if the game "resets" - as in boots up again, or "re starts" as in starts a new game. This is the clue here. If the problem lies in the switch matrix, and the "start" button is in the same row or column as the switch in the plunger lane, then either the diode across the start button, or the plunger coil might be wired in the wrong way around. Coils will still work in the coil test as they are being fired - not via the logic in the switch matrix.

The comments on the thread that don't belong here will be removed if they continue. A member comes here for FREE help and advise (the whole reason this forum exists), and has to put up with a sales pitch. If the OP decides to buy a replacement board, that's his decision. If he wants it repaired, I'm sure he will PM either of the board repairers.