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Hi again @yaser4lov
Did Support inform you that you need a new motherboard?
You could try getting in touch with EET Europarts who are Sony's official parts retailer.
Cheers
How did the mainboard broke.. I wonder..
I wonder, too, I think we should ask this question to Sony company
Keep at them, firmware update issue completely ruining tvs
I searched this site I have not found.
Trust .. there’s a lot of people with the same issue.
sony eventually reimbursed me after enough fuss
Maybe they paid you because your tv is still under warranty bbu mine is out of warranty I bought it in 2016.