JBL SB400 sound bar, no sound

To anyone familiar with this JBL SB400 Sound bar, it just stopped working after a few years. It lights up like normal and links with the subwoofer via Bluetooth, but there's no sound no matter which input I use including the Bluetooth. I'm assuming it's something like a preamp board, but thought I'd post here and see what others have experienced and the cost involved. Thank you in advance. - Robert