Everytime I run my steamdeck on my tv i have to do this precisely in this order 0. Turn off steamdeck 1.unplug steamdeck and disconnect video cable (hdmi) 2.turn on tv and choose hdmi 1 for input 3. Turn on steamdeck 4. Once turned on plug in hdmi cable 5. Video should turn off on steamdeck and turn on on tv 6. Now plug in power to steamdeck
I found this solution online in a forum after much searching. Its like witchcraft but must be done exactly in this order. Gerd lerk, lemme know if it works.
The dock has 2 cords. The power cord and the hdmi that plugs into the top of steam deck. In my instructions im calling the plug that goes into the top the hdmi. The power cord for the dock i just unplug at the wall