Probably needs a new motherboard then Jim. Around P4k to P5k fitted.
If it's 4 years or older not worth spending too much on repairs IMHO as something else will go pretty soon...backlights for example.
Had a 55 inch TCL lose some Led backlight so looked for someone to fix, the authorized repair in Duma was LJ Electronics off of Jose Romero down the road to DACCA . They fixed my TV while I was in Duma for the day (we live in Pamplona). Never had one day service in the 6 years here in Negros so I cannot recommend highly enough. cost was 2500 plus parts. Very satisfied