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Good afternoon, how many times does the status light flash?
Sorry for the delay in responding, 5 flashes suggests a main board failure, so you looking at replacing the main PCB in the TV which will require the unit to be taken to a repair centre.
the typical cost is around £70, but can very depending on the exact model of Samsung and your location (since labour costs are double in london etc).
If you provide me with your postcode I can recommend a local engineer.