Bose Soundbar 500 issue (sounds like connecting/disconnecting)
I have Bose Soundbar 500 with subwoofer and from time to time I have this issue with strange annoying sound like connect/disconnect or something like this, because I can't find nothing which is like this sound (attaching video). This sound comes even if the Soundbar in "stand by" mode or in operation. Only hard reboot (disconnecting power) helps. What could it be?
P.s. Tried turn off subwoofer, put soundbar in "stand by" mode. Soundbar connected to TV by optical cable.