Hi, for last few days I have problem with HDMI-CEC, it was working fine, when I turned on Mi Box, TV turned on, when I turned it off, TV also turned off. But now it does nothing, I tried to reenable CEC settings on my box and also on TV, but it didn't help.
Well, I did nothing and it works again, weird...
Im having the similar problem. But i think i found the answer to this. Try press the home button "O". It should start the device and your tv. Hooray!
Reset Mi Box S to factory default.
Try a different HDMI cable and report back
Same issue
Try registering to a beta program, I believe new update meant to improve HDMI-CEC or something.