Hello, Offhand this blink code generally points to a fault in the backlight power supply in the set (LED inverter).
However to find out more info, I need some more information.
1) Are you able to get the full model number off of the back of the set?
2) How long have you owned it for and when did the problem occur?
Hello and Welcome. My name is Michael.
On this link you will find the answer you are looking for:
Please let me know if there is anything else I could help you with.