Most of the smart TV'S comes with blinking (LED) codes, but meaning of these blinking codes differs from manufacturers to manufacturers. Just Google it (manufacturer / brand / model) and you may find the problem. Most probably this problem is related to power supply (bulged capacitor).
I am not a qualified electronic engineer but after extensive research in Google and other forums, I can say that this could be a problem of ‘backlight'. This happens due to various reasons. Power supply failure to backlight LEDs. Bad LED or strip and maybe other fault.