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Old 11-25-2016, 06:19 PM   #2
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Join Date: Dec 2013
City & State: Tathra, New South Wales
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Default Re: Hitachi LE55A6R9A - No backlight

If you are SURE there in no voltage at those output pins then it would be a power supply fault. If you look at the printed tracks you should be able to see how the circuit is connected and confirm exactly just what the configuration of those output pins are. Sometimes it a series type configuration, sometimes a parallel configuration. It is a very basic circuit at the LED output driver by looks of things. Check those rectifier diodes.
If you find you have volts then you probably have a failed LED in the string in the panel. USUALLY that means a write-off unless you have the skills to open up the panel and replace an LED.
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