No picture Hisense 55K20DG LED backlight repair svh550aa2 HD550DF

Tv has no picture but sound ok. Here shown is the backlight replacement with optional very cheap single LED repair.
LED strips used are 11x HD550DF-B57/S0 (svh550aa2_rev05_7led_130719).
LEDs are 3528 types with large anode pad.
Finally the LED current will be lowered on the driver PCB to prevent this from happening again.
Also used in 55K23DG and NS-55D550NA15