Video linked below of screen issue.

TV worked fine for 18 months, suddenly did not have video anymore.
Cleaned all ribbons and connections with canned air, no change.
Cleaned all ribbons and connections with rubbing alcohol, no change.
Replaced T-Con board, no change.
Inspected all the caps on the power board, none are bulging or out of place or broken.

Wife is about to kill me for thinking I need to spend $200 on a new mainboard. Any ideas?

[url]https://youtube.com/shorts/UaCupH8yiUQ?feature=share[/url]Video linked below of screen

Re: LG OLED 55EC930V Horizontal flashing lines problems

Seems like these OLED issues are never as simple as I had hoped. I have read/lurked alot here and was hoping swapping in a T-con board could help my TV.

I have yet to multimeter test the T-con board, and I am somewhat unsure of how to do it, so I considered just finding one on ebay and swapping it. You are so knowledgeable here.

Was a $2000 Tv so very sad that it just died outside of warranty. I am new member so apologies for adding to old thread.