Several issues can prevent your television from turning on, some of which have nothing to do with the quality or condition of the TV itself. With a little troubleshooting, you may be able to find the problem and restore power. Otherwise, a qualified technician will have to take a look. No matter the cause of the problem, don't attempt to repair a TV yourself unless you are qualified to do so.
Check to make sure the TV is plugged in to a power outlet.
Plug the TV into a different power outlet if it doesn't turn on. If doing so causes the TV to turn on, the original power outlet is the problem.
Turn your TV on. If the TV doesn't turn on when you use the remote control, press the "Power" button below its screen. If the TV turns on, you need to replace your remote control's batteries.
Contact a television technician if your TV still doesn't turn on. Don't attempt to access the inside components of the TV unless you are trained in how to do so.