once you remove the back from your TV, turn it on and check if you can see the backlight on. Inspection holes can be used as shown
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[image|1519050]
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[image|1519048]
If no backlight is visible start by measuring the connector on th epower board and see if it shows 24V on it.
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[image|1519048]
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[image|1519050]
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Post some images of all of your boards with your question. That way we can see what you see. Use this guide https://www.ifixit.com/Guide/Adding+images+to+an+existing+question/21499 for that
'''++@kyriazisv++'''
once you remove the back from your TV, turn it on and check if you can see the backlight on. Inspection holes can be used as shown
[image|1519050]
If no backlight is visible start by measuring the connector on th epower board and see if it shows 24V on it.
[image|1519048]