The suggestions so far suggest you could fix the problem by gently pressing on a few of the chips on the MPU. It would be hard to break anything this way. Yes- there is a potential you have some fairly easy soldering to do and if your not comfortable doing so repair would be an option.

As for wholesale purchase of new boards- go for it if you have neither the time nor inclination to attempt to troubleshoot/fix/have fixed the existing boards. However...

I would suggest that before you make the purchase you ask around of others more experienced than I- for the best boards to use. There are cases where new is not better. Would be good to know for this game where you sit before you commit to a random total board replacement. Just sayin- sounds like your rushing through this big time. Slow down and make a good decision.