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I have a Sharp LC-40LB700X LED television with a failed power supply board. Second hand are about $200, new is $350. So I want to attempt to repair by tracking down and replacing the faulty component. Where could I find some schematics to help me track down the fault? The board part number is RUNTKA623W.

Hi, If the worst comes to worst here is a link to the service manual for your TV. Unfortunately is costs $8.99 to get it. Scroll down to find your model. http://www.acdcmanuals.com/sm/index.php?…