This 65" Samsung UN65TU7000F TV will not turn on due to a faulty mainboard. In this video I will show you how to properly diagnose a bad mainboard for any LED tv.

Steps:

1. Disconnect the power cable from the main board to the power supply
2. Turn on your tv and see if the backlight turn on.
3. If the backlights turn on the issue is the main board.
4. Order a new mainboard by using the code number on the mainboard
5. Order from tvparts.ca or other website.
6. Install and enjoy!!!

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