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Old 01-21-2018, 02:59 AM   #49
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Join Date: Oct 2012
City & State: Folsom, CA
My Country: USA
Line Voltage: 120vac 60hz
I'm a: Hobbyist Tech
Posts: 3,720
Default Re: Sony XBR75X850C no picture backlights on

Ok confirmed voltages are not turning on. Like I said before bridging ICA1 or ICB1 will generate a crosshatch flickering pattern because of crosstalk feedback and not a filtered DC bus to the AVDD, only supplying 10v to AVDD this way, where it need a a minimum of 16v I can see an image!

So DC regulators are for certain not being turned on. Why?

5 tcons later and same thing!

Is this the mainboard that has tok do the switching? Of course with this hack I still have no VCOM, VREF, or VGH, so it's not right however looks like the panel is trying to work.
Did I leave the soldering iron on?
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