TV picture won't come on

My LG OLED Model # OLED65B7A-U turns on, but the screen stays black. I have tried unplugging and holding the power button, but no luck. Any other advice?

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Take a torch and shine it on the screen in a dark room. If you see any picture displayed, then your backlight is faulty. If not, you might need further digging to find out why there is no picture.

Is there sound at all?

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