Vertical bar slightly darker than rest of display

Vertical bar slightly darker than rest of display

Hi everyone. Hoping someone could offer me some guidance. I’ve had a TCL 5 series for just about 3 months. I have started getting a dark vertical section on the display and it is driving me nuts. It is really apparent during bright scenes - especially when the background is white. I have power recycled, did factory reset, etc. Nothing. Any thoughts would be greatly appreciated.

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