Power out/circuit breaker good

Make sure you flipped the circuit breaker completely off then back on again. Depending how old your house is you may have ARCI breaker or outlet. If this is the case it is either faulty or your T.V. is faulty. You should check all your outlets and switches yearly and replace as needed. There are any number of books available at home centers that can teach what to look for. If you can, check to see what all is on the circuit as well. It is very rare that one room is wired to one circuit. Houses are wired based on the principle that not all outlets and lighting will have demand at the same time. The outlet maybe on a branch circuit that is supplying power to other devices causing the demand to exceed the rating of the breaker and or wiring. In rare cases there is damage to wires in the wall and when they heat up the wires seperate in the sheathing. At any rate if upon doing a basic home inspection of the outlet and related outlets you dont find anything it is time to call in the electrician. I don't recommend homeowners working in panel boxes as most do not fully comprehend the dangers involved or the math in figuring out load capacities. Also there are many code requirements involved in the various aspects of working with electricity that are best left to electricians to decipher.