Perhaps disconnect the plug? Wouldn't that keep it turned off? I mean maybe i missed something here. But if all u need is to keep the tv off then u could like turn the power off the switch or disconnect the plug?
There are few possible reasons that I can think of 1. Faulty remote control. You can check this by removing batteries 2. Schedule to turn on TV automatically(On Timer) 3. Hardware issue The most possible case is number 2
