One of the propellers is not spinning

My brother’s small RC “6-axis gyro” took a tumble off my bed, and now one of the propellers won’t spin. It does not look damaged. Any tips on how to fix it?

Oh man, that stinks… I had a similar issue with my RC after it took a fall. Even if it looks fine, sometimes a tiny wire inside gets loose. Try gently wiggling the propeller or checking if any tiny piece of dust got stuck in there. Worked for me once