I suggest to reset the unit ro factory settings:
- Go into the Setup mode, find the "reset to factory" option.
- Select it
- Let go of the button then prompted
- Press the TX key when prompted
- Power cycle the bitx
If the BFO is way off the rig will turn deaf. An other symptom is that the sidebands are reversed.
I ended up tuning into a station using the "correct" sideband for that frequency. Then selected: Setup > BFO and turned the dial untill the audio was audible.
Hope this helps,