Question about Roku Televison & Video
You can replace every board in the TV and chances are it won't fix it. Like 95% of sets that don't have backlights it's a backlight strip issue, the backlight strips have failed and the power board is shutting down the negative return path because of over current. On a set this sie it won't be easy to do yourself but it can be done, you will want to use suction cups to remove and replace the panel, it's very fragile and the larger the TV the harder it is to handle, order 4 suction cups on ebay or amazon. Also view some youtube vids on how to do it.
Posted on Sep 13, 2021
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