Hi Dan,
Please use our new Forum -
link - for any new questions.
It sounds like the B2's operating software, stored on the SD Card, may have been corrupted somehow - perhaps a power cut.
This can be fixed by reprogramming or replacing the SD Card. Please email us on - thebrennanb2 @ gmail . com - no spaces, with a brief description of the problem and we will do our best to sort it for you.
Your music is stored separately on the HDD or SSD, so should be safe.
Paul
Brennan Support.