It might be the case, that the connectors to the motor have become unplugged, however, the way the Mig15 built, and since it came as an RTF, I can't access the motor or the ESC :-( they located in the middle of the body, between the 2 wings. I will have to cut the airplane in 2, to be able to access them :-(

BTW, thanks for the correction for the source of the beep.

I hope there is a simple solution for that Nitro Support :-(

Dvir