Thank you for confirming,
Unfortunately, the issues you are experiencing are symptomatic of an internal hardware defect, meaning a faulty power main board or tcon board, though there are many possible failure points including defects in the panel tab bond connectors (the screen itself) which are not repairable. This issue could be a manufacturing defect, but is also often caused by a power event (shock/surge, prolonged over/under voltage condition, etc).
This could also be the result of age related wear and tear; as a 2013 model tv, that type of failure wouldn’t be surprising. This unit is already at/past its service life.
There is one step you can take here, both as a possible fix, as well as a diagnostic evaluation:
1) Unplug the power cord from the outlet
2) Wait at least 1 hour (60+ Minutes)
3) Press and hold the power button for 60 seconds
4) Keep holding power button while plugging back in, and for another 60 seconds after. When plugging back in, go directly to the wall outlet, bypassing any power strips or surge protectors.
If this reset process does not work, it would unfortunately confirm an internal hardware failure.
This is something that would require repairs to correct; though repairs for these are simply not feasible. There are no parts available for them and labor alone would be as much as the price of a new monitor. You would be better off replacing the entire monitor at this point.
My apologies for the news,