As I said in post#2 for an item such as this to fail within 3 years it would be quite reasonable to assume it was
NOT fit for purpose
OR
Of merchantable quality.
The Sale Of Goods Act 1979 & the Supply Of Goods And Services Act 1982 give you the consumer several rights that exceed he duration of any manufactures waranty...
can be up to 6 years from purchase..
Sale of Goods Act | Consumer Information
[ARCHIVED CONTENT] Sale of Goods Act Fact Sheet - BIS
Your contract was to purchase from your supplier...
Their contract to initially get the goods they sold to you was with a wholesaler or manufacture..
So you start your complaint chain with your supplier..
They have legal obligations that they cannot pass you directly to the manufacture..
( Although Obviously it is the manufacture of the product who has failed not the middleman retailer.. )
They should resolve the matter with you and take up their own claim back to their supplier if required.
But on occasion with mutual consent of all parties the middle man retailer can be by-passed and the manufacture deal direct with the customer.
The point is....
The SoG act give rights up to 6 years that the retailer CANNOT say ooh its out of warranty we don't have to do anything!
The above points obviously assume that no security seals have been broken by removing any covers to look in the back of the TV?
:| :C