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Bad vizio v505-g9 backlight or video board.

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    Bad vizio v505-g9 backlight or video board.

    Getting picture but no backlight. Getting 45v every white wire on led connector. Could it be anything else other than a bad backlight? Would assume that the 4 strips would be independent of each other.
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    Last edited by knoxrebel; 07-23-2021, 08:19 PM.

    #2
    Re: Bad vizio v505-g9 backlight or video board.

    45v is the led supply, which might be high indicating an open string. There seem to be 9 led's per string at 3v each would be 27v. The 4 return lines are 0 volts likely because the led driver is in protection.
    I would suspect bad led's in the panel
    Last edited by R_J; 07-23-2021, 08:35 PM.

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      #3
      Re: Bad vizio v505-g9 backlight or video board.

      Unfortunately you were correct. 1-2 bad leds per strip.

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