Was watching a movie and my LG web os went blue. Sound is still on

My TV went blue and wouldn't come on. Sound still on but no image. Have tried checking all connections including HDMI and USB. The magic remote cursor is also not showing on the TV screen

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Aleh Alexander so your screen is completely blue? You do not get any kind of splash screen (LG Symbol etc.) when you turn your TV on? What exact model is your TV?

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