Hello, My name is ***** ***** I'll be assisting you. I'm sorry you're having problems. I'm reviewing your details now and will reply shortly.
The first thing you would try, is disconnect the set from power, then press and hold the power button on the TV itself (not the remote), for 10 seconds and release. Then plug the set back in, and also check that the power cord is connected tight at the TV as well. Press power once, and see if the set powers up normally. Try this procedure up to 2 times, and please let me know what happens.
Are you able to get the Input to change on the set?
Okay, I have no way of knowing what Input you have the TV set to. You said you could not change the input before. Can you physically change the Input setting on the TV please?
Are you still there?
Do you still require assistance with this?
Please let me know