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Old 12-03-2017, 03:59 PM   #5
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Join Date: Oct 2012
City & State: Folsom, CA
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Default Re: Sony XBR75X850C no picture backlights on

Ok. More research shows if you power up tv w/o tcon connected, automatic flashing green and amber status light. Meaning eeprom lost panel ID configuration. Weird system..this requires a sub update every time. Going blind update Because you will not see what is happening on the screen because it's completely dead even back lights are out and no 12v to tcon. After about an hour the update will finish in allow the back lights to come on in supply 12 V to tcon. This will happen every time you disconnect the tcon in power up the TV
Did I leave the soldering iron on?
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