So ran into this problem similar to the link I'm showing. Just wanted a reference for someone else If they ran across it. Good luck!
https://www.badcaps.net/forum/showth...ghlight=Uh5500
This is a old thread but I picked up a TV with almost exact symptoms. Has no voltage to TCON either. Led tester showed all backlights working. Decided I probably wasn't going to buy a new main board but was unsure. Decided to reflow the main chip on the main board for shits and giggles and TV turned on again. So verified main board. Unsure if it will stay working but for the symptoms it was main board issue.
https://www.badcaps.net/forum/showth...ghlight=Uh5500
This is a old thread but I picked up a TV with almost exact symptoms. Has no voltage to TCON either. Led tester showed all backlights working. Decided I probably wasn't going to buy a new main board but was unsure. Decided to reflow the main chip on the main board for shits and giggles and TV turned on again. So verified main board. Unsure if it will stay working but for the symptoms it was main board issue.