Your solution worked perfectly on my Toshiba 55L310U. Thank you!
What solution worked for you? I’m having the same problem.
I had the same problem! Your solution worked on my Toshiba 40E220U model, but I had to go to their REGZA settings to turn the auto power “on”. Even then, the actual power button didn’t turn it on, but the Home button did. Weird, but I’ll take it!!! Thank you!
Thanks but nothing on my HDMI screen that let's me do that.
What TV model number do you have?
Also, have you verified that One Touch Play is enabled on your Roku device. (Settings/System/Control other Devices/1-touch play (checkmark to Enable).
Once 1-touch play and your TV's CEC is enabled, should be able to press any button on remote (other than volume controls) to automatically wake up Roku device, power the tv on, and automatically switch to the Roku's HDMI input.
I was able to make mine work only by merging two of the proposed solutions with a twist. I changed the tv setting for the HDMI / Regza Link - Auto On to Yes. Then only will it power on the TV if I hit both the Power button and Volume Up button simultaneously! And I used to love Roku.