You can also try plugging in TV into surge strip that has a reset button. Turn the strip off and on. I've used this method for my TV, my dishwasher, and other things that give error code or just won't turn on. Let me know if it works for you.
Please read the link in its entirety to reap the full benefit of the troubleshooting. If this does not help I recommend letting a service technician have a look. As we would like to gather additional information and look at this from a case-by-case basis, please provide the full model code and the serial number of the device as well as your best contact phone number, name, and email.
