B300 long press start

I have an AC 200P connected with a B300. The solar panels charge the B300 which in turn charges the AC200P after a long press on the power button on the B300. The long press function stopped working yesterday and the power button won’t blink any more. Is there a reset or something I can do or is the unit broken? The DC function still works on the B300. The AC200P still works fine by itself.

I found out that I have to disconnect all cables to the B300 and that lets me reset the B300 and then the power button works again.

That’s what I’m hoping. So far several hours is not enough. I’ll try again tomorrow.

Have you tried to use bluetooth. If it on, it should connect. Maybe it a burnt light?