While this is a warranty issue, the fact you wrote DC tells me something is way off base here.
Hello,
Just bought a refurbished TV (LG 49inch HD TV)
Got it home, plugged it in and the TV just flickers (see video)
https://youtu.be/8K7LQjtUxoA
The TV came with no power cable, the power cable is a DC fitting, I had one available from a laptop which I've used, could that be the issue?

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