oh yeah, i tried everything. but i found the answer.... i changed the mainboard. what happened first, TV didn't have anything on pic but sound. so i changed the main board, and the t-con. nothing worked, decided to get another t-con board, and it worked! but everything was upside down. so i tried everything, updated firmware, login to the service menu, reset, etc. so i thought i am going to put back again the old mainboard... and it worked!
thank you tho

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