Soundtouch 520 CEC function suddenly stopped working
I have been just recently enjoying my Bose Soundtouch 520 (Cinemate) with my Sharp Aquos 75'' 4K TV via ARC.
Everything was working perfectly fine through CEC on both devices. I had the Bose HDMI cable running into the TV input on the Bose console into my Sharp ARC (HDMI 2). I had all the settings set up correctly CEC & MHL Control on in the TV and CEC on Alternate on the Bose console. They were working together perfectly fine, I was able to turn on/off both devices with either my Sharp remote or my Bose remote as well as volume.
Suddenly about a week ago, the communication between the two devices stopped completely. I've done factory resets/firmware upgrades on both devices and nothing is resolved. I've tested all HDMI cables and inputs on both devices and each and every component is working seperately. I can play music through my Bose console via Bluetooth on my iPhone/Macbook or connected hardwired with HDMI in all inputs. But the television and the Bose console just simply will not speak to eachother, when I click "CEC detect" on the television, it finds nothing. Before, the Bose system was listed under the CEC devices in my television. And because my Bose system does not detect a television anymore, whenever I try to troubleshoot the issue, the Bose system will automatically turn off after about 20 mins because it sees no connection at all.
What is going on?! Please help!