My lg60pn6500 tv flicks on shows no picture and I hear white noise

My lg60pn6500 tv flicks on shows no picture and I hear white noise

My tv turns on lights up but shows no picture. And I hear fuzz or white noise coming from the speakers which I can control how loud it is with the volume control on the remote. I just replaced the main board. Anything else I should look for? nothing on any of the other boards looks bad or unusual.

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