It seems that Samsung LED TV sets have a habit of blowing
up the high-brightness LEDs that were introduced to replace
the fluorescent tubes as back lights for the LCD screens.

I do not expect to lose the TV only 14 months after purchase
(2 months outside warranty) when previously the LCD / fluorescent
sets ran for 5 years or more!

Perhaps there is scope for furnishing our own LED array and powering it
separately,
because the telly is otherwise working (picture visible of shine a torch at
the black screen)?