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Hello, Sorry you're having problems. Offhand these symptoms would point to a fault in the mainboard of the TV (which processes the on/off, remote commands, MENU, etc.). In some cases this board has failed and needs to be replaced.
However it's worth it to try a hard reset, as sometimes the processor in the TV can simply have locked up.
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 and functions normally using the remote. Try this procedure up to 2 times, and please let me know what happens.
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