He's had quite a few high offers for the pcb so let's hope all the relevant stuff gets dumped & submitted to MAME so at least it can all be checked to see if anything is bad & give him some help in fixing it, plus info on how to get the pcb into a healthy state as there could be various things that need replacing that don't look bad to the eye.
Let's not have this to be found then hoarded away & not seen or played again ! It must be enjoyed by everyone & then for the next generations to come, a game not played even when bad is still a game that was made to be played.