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TV on, green power light on. No picture, no sound, flashlight test no video, no back lights, no green lines. Turning the TV off and on sometimes works to turn it on. I think the power supply board.

I am not sure how to rule out the TCON board. I do have all the voltages taken from GF2 board (ZBV A1362552A)

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  • Craig Isenberg
    Craig Isenberg Apr 09, 2015

    Connector CN 6150 12V = 12.46 12V = 12.46 12V = 12.46 12V = 12.46 6V = 6.33 6V = 6.33 Connector CN 6152 12V = 12.46 12V = 12.46 Audio VCC = 13.62 Audio VCC = 13.62 Connector CN 6153 Balance ERR 46mv 12V = 12.46 INV ERR 50.2mv Back light 0 Dimmer 12.2 mv CN 6154 Balance ERR 46mv INV ERR 50.2mv Back light 0 Dimmer 15.1mv AC Relay 3.258 PFC Det 2.742 PS ERR 0 Stdby 4.96 CN6501 328.5 V CN6502 328.4 V

  • Craig Isenberg
    Craig Isenberg Apr 09, 2015

    It dropped my make and model, it's a Sony Bravia KDL-52WL130

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Fault to its main board. Short circuited component/s at it. Contact any service technician; or the authorized service center. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. http://electronicshelponline.blogspot.com/ . In most cases, the main board might have to be replaced. If so, a software [firmware] update too might be necessary.

Posted on Apr 09, 2015

Testimonial: "Are you sure it is the main board? The TV did power up again and all voltages on the power supply board were the same except on connector CN 6154, the Inv ERR and back light voltages went to 3.25 volts. Where can I get a schematic for the Power Supply board or which transistor generates the 3.25 volts."

  • The Knight
    The Knight Apr 13, 2015

    Just surf patiently the above mentioned site. I'm sure that you might get some details.

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