Samsung TV + Chromecast with Google TV = No HDMI Signal
Samsung Smart TV (UE40H6400) with Google TV Chromecast (2020) connected. When the TV is switched off and then switched back on, it shows No Signal on the HDMI port to which Google TV Chromecast is connected (I tried different HDMI ports).
(1) Check the cable connections and the settings of your source device.
(2) Press Source on your remote control to select the connected source device.
Pressing any button on the Samsung TV does nothing, however, pressing any button on the Google TV remote fixes the issue immediately (at which point Samsung TV remote also starts controlling the Google TV interface). For a slightly more elaborate workaround (or if you don't have Google TV remote at hand), you can press Tools on Samsung TV remote, then select Anynet+ (HDMI-CEC) option.