A pinched wire would kill the board. No output wire or switch can touch frame (motor, LEDs, speaker, smoke unit, or sound switch).
If the speaker wire shorted- first it blows the audio amplifier, however that can feed the AC voltage into the rest of the 5V DC circuit blowing every chip on the board to include the radio module. Easily explains why nothing works and the remote cannot connect. That board is likely deader than dead. Complete and total destruction.
