This trophy can be earned whilst you are in The Slums. As you make your way towards the main objective, you will climb up onto the rooftops. When there take a look around, near to where you need to go for the main story you should spot a robot laying down on the roof. There should be another roof lower down just next to where this robot is laying.
This is the TV you are looking for!
You should spot the TV sitting on a little table, just across from it is a sofa with a remote on it. Click the triangle button to interact with the remote, do this 8 times and the trophy will be yours!