We have the same problem. Had to buy a roku device to keep Netflix. Netflix worked great before but dark now.
And yes we adjusted the brightness on the tv
Hi @LB86,
Greetings from the Roku Community!
We're happy to assist you with your problem with streaming Netflix. We'd like to know more about it so we can further assist you. Please provide the details below.
In the meantime, please try to restart the system by going to Settings > System > Power > System restart (if you do not see a Power submenu, skip to the next step) and see if it fixes the issue.
We'll be waiting for your response.
Kind regards.
Eunice