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My LG TV powers on flashes the LG Screen logo then goes black the sensoe

@ghxst fixing things is never a waste of time. That is what keeps us going and that is what we need to do. Anyhow, its’s an LG and they are having issues with subpar backlight strips. You did not give us your TV’s model number so we really don’t have an in depth answer for you. Something like this 42" LG TV LED Strip Replacement Tutorial should be pretty similar of what your TV would need, to get fixed. Not complicated but maybe a bit of a PITA to do it. Just remember REPAIR IS WAR ON ENTROPY