On Nov 19, 12:41*pm, jeff_wisnia
wrote:
The "ALL" button on my Comcast "Custom 3 Device Remote Control" has
stopped working properly and only switches the cable box on and off, but
no longer controls the TV.

I can't find anything in the Remote Control manual describing this
faulty action of the "ALL" button.

It's a bad manual (not guessing, I've been there).
The Comcast help menu might have instructions for doing the
programming of the remote for the function you want; that function
has to be turned OFF if you want to turn the TV off and let
your TiVO record during the night.