To the op, I really would not just start changing chips randomly, without first working out what is actually up with the board. To fix this you will need a logic probe, decent soldering iron, desoldering station and lots of time and patience. Too many boards get chips changed for no reason that end up being the cause of extra faults and if you aren't good with a soldering iron, desoldering iron/station then the chance of ruining the pcb is very high. If this board gets ruined then your game really is scrap... Anyway just my view.start with u41 then 42, 51 then the minor chips until you get it booting.
This is just my opinion but I think you’re going about this all wrong.Anyone got a Millionaire playfield??!
This is just my opinion but I think you’re going about this all wrong.
You say you’re on a budget, then get the machine working and worry about a better playfield last. Once it’s working it’s playable abeit with a cr*p playfield but playable. Then sort out the playfield.
You do a playfield swap and then get boards and it don’t work you’re not gonna know whether it’s something you’ve caused or not.