Facing TV Problems? Ask a TV Technician.
Hi and welcome to JustAnswer,Thank you for the question and your patience. Should you still need assistance for information purposes only...Initially, have you tried unplugging for an extended period of time? ...the idea is to simulate a soft RESET.
While unplugged, can yoiu press on the button(s) every now and then? ....this would help discharge any residual power inside the TV.
Longer please; as posted above, simulate a reset, press on the buttons unplug for an extended period of time. ...even overnight.
Yes; it would simulate a RESET which would serve as an attempt of a fix and as a test by process of elimination. If not corrective, then it would confirm the internal hardware issue.
Please post back how things turned up and/or should additional information be needed.
The above is the only easy user doable try as all others would be internal.
I realize that the above information may perhaps be not what was expected. Unfortunately, there is no quick-n-easy fix and neither is there a workaround; sorry for having to be the bearer of bad news.