A neighbor had trouble with her cable box. The initial symptom was different ("stuck in subtl off")
When I got to her house the final version of the problem was the "all on" was toggling the TV on and the cable box off, so either the TV or the cable box was on, but not both.
On a hunch I took out my cell and compared two of her remotes (TV and cable box). The cable box was dimmer. Sure enough, replacing the batteries made one button light up on xmit.
When I got to her house the final version of the problem was the "all on" was toggling the TV on and the cable box off, so either the TV or the cable box was on, but not both.
On a hunch I took out my cell and compared two of her remotes (TV and cable box). The cable box was dimmer. Sure enough, replacing the batteries made one button light up on xmit.