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Old 12-08-2017, 09:56 AM   #13
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Join Date: Oct 2012
City & State: Folsom, CA
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Default Re: Sony XBR75X850C no picture backlights on

But is my theory correct That some tcon boards need to have a fully integrated input and output feedback to the tcon in order to power up all voltages? It's just nothing that I have seen before period usually supplying an external signal of 12 votes to AT con will allow all voltages to come up whether the panel is connected or not. These 2 boards that I have now will not allow any voltages to come up with just 12 votes connected and no panel.
Did I leave the soldering iron on?
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