shelleycat
Since you knew the TV was her main form of entertainment, then I'd say the odds are very very high that that was an actual visit. :) She would know you'd put 2 and 2 together like that. :)
From what I've read, once we leave this plane of form and substance and before we totally leave to go onto "higher" (less vibrationally dense) planes of existence, we can easily manipulate energy with our thoughts, and electrical/static energy flow is actually quite easy to manipulate (people still here can do it witha bit of practice) so a lot of messages from there involve electrical objects.
Some people manage to manipulate harder objects like beds, I have no idea how they could do that! but I did a reading for a woman whose Dad was constantly shaking the bed so that she had to sleep on the couch! cracked me up. So I guess turning off a TV is well within most people's capabilities. :)