I've tried it way too many times to count, this is my last achievement too it;s getting very annoying, I've used like 3 different youtube videos and I know you need 114 to get it, I don't understand why it hasnt popped for me
I'm doing a run through right now and counting every single tv I hit or has got hit.
EDIT: got it
the blacked out ones count too, I didn't know that. well, another 1000/1000. Nice guide too.