Question about Sony 40 KDL40EX720 3D LCD TV
Check the voltage that goes to its back light inverter board, from the main power supply regulator board. If there is no voltage, there will be no backlight and the screen will be dark. If there is voltage, and still the screen is dark, you have to contact the authorized service center for Sony; because, to repair it, the display panel have to be disassembled. It is a skilled work, and not a user repairable one.
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Posted on Apr 14, 2014
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Posted on Jan 02, 2017
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