Hello, systems never have CRC errors if it's incomparable, (will have some other error cant remember now) your system version is pretty much the latest anyway.
Are you using a System Riser board? or the system chips directly on the board? Also, old boards (non XP) max out at 4 game eproms unless you use the really large riser board.
A CRC error is going to be; Eproms not erased for long enough or faulty, Eproms not in correct position swapped around, bad dump, large games running on older board (non xp) and or not using riser board, main board has issues (they can get a fault as the boards warp a bit and have internal issues, you can sometimes gently bend the board up and it might boot play for a bit until that too fails, but if other games work then its not that).