If you have indication of signal input for both channel you can go and reverse output cables of the speakers if the problem transfer to good channel change speaker cable-if you did not have input indication in the bad channel try to inverse input cable if it is cleared change your input cable if not you will have internal trouble and need service center to help.
Answers & Comments
If you have indication of signal input for both channel you can go and reverse output cables of the speakers if the problem transfer to good channel change speaker cable-if you did not have input indication in the bad channel try to inverse input cable if it is cleared change your input cable if not you will have internal trouble and need service center to help.