Originally Posted by Qefx
I´m not quit sure if it is an Android problem or a problem with my box.
When I switch off the TV when the box is connected via HMDI the box goes "off" (switching off sound for example) is there a way or setting to keep it on? So I can switch off TV and keep spotify for example on?
Yes! I use my Chromecast in this way. What you need is an HDMI pass through device, like a stereo tuner. I have both a Chromecast and Roku dongle plugged into the HDMI ports on my tuner (it has a total of 4 hdmi ports) . A single HDMI cable then runs from the tuner to the TV. The sound comes out of my stereo speakers, not the tv, and I use the stereo's remote control to switch inputs (the TV itself is never changed from its HDMI1 input). This allows me to listen to the audio without having the TV turned on. Tuners with HDMI pass through can be expensive, but I got lucky and found one, virtually brand new with 4 HDMI inputs, at my local Good Will for $65. And if you're into cord cutting, check out my website at cablegobyebye.com