Hi @vshanewilk ,
If the TV is still covered by a warranty, get it fixed under warranty
If the TV is no longer covered by the warranty, try the following.
Disconnect the power from the TV and then remove the back cover.
Then disconnect the cable that runs between the power board and the mainboard.
Reconnect the power to the TV and switch on the TV.
All the TV panel backlights should turn on and stay on. There will be no picture as the mainboard has been disconnected.
If they don’t stay on check the voltage at the backlight cable connector on the power board.
If it reads no or low voltage then there is a problem with the power board.
If it reads high voltage (180-300V DC) then there is a problem with the backlights. There is either a faulty connection somewhere between the power board and the backlight array or some failing backlight LEDs