slipstick:
Do you mean that the black motor will not spin even when you connect a battery directly to it?
Correct. The motor is somehow busted/jammed. I did order new motors online, however they take forever to get through customs in Finland so I was hoping there could be another solution to this other than trying new motors. Do you happen to know if the resulting current draw would affect the IR receiver in any way?
Thanks so much Steve!