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Need Help Identifying an HDMI Chip on Vizio LCD TV

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    #1

    Need Help Identifying an HDMI Chip on Vizio LCD TV

    I have repaired a few Vizio LCD TV'S, I gave one 42" Vizio to a family member and it works great with the exception of both HDMI Ports not working at all, I have an old defective Mainboard from a 37" Vizio that had a problem with the main processor chip (re-flow gone bad) but when it was working the HDMI Ports did work on that board

    Looking at the pictures (shown here) I have of both boards I can see an 8 pin IC Chip just above each HDMI Port but can't really see the part numbers on the chips, I'm wondering if anyone knows if these chips are what usually go bad and if they could possibly be the same parts on the two different boards, so maybe I could pull the good ones and use them on the 42" that has the non-working HDMI Ports.

    I have read some other threads that say these chips can not be purchased due to copyright or something like that. Your comments are appreciated.
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    #2
    Re: Need Help Identifying an HDMI Chip on Vizio LCD TV

    Originally posted by MisterD View Post
    but can't really see the part numbers on the chips,
    Try cleaning the top of the chip with some isopropyl alcohol.

    Try taking a very close up picture of it with macro mode enabled on the camera and then view the picture on a computer. Lots of sunlight will help get a clear picture.
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      #3
      Re: Need Help Identifying an HDMI Chip on Vizio LCD TV

      The chip is an EDID EEPROM and only stores the resolutions and modes that the TV supports for computers and attached devices. Failure should not cause a loss of HDMI video. You can see the differential pairs leading into the large heatsinked processor, where all of the magic with the HDMI happens. If there is a fault, it will likely be with that processor, and it would be difficult to find a replacement. There's a small chance that the HDMI mux is failed, if it uses one, but again, that would be hard to find a replacement for.
      Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
      For service manual, schematic, boardview (board view), datasheet, cad - use our search.

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        #4
        Re: Need Help Identifying an HDMI Chip on Vizio LCD TV

        Thanks Tom, I guess I'll have to replace the Main Board if I really want to fix the HDMI, otherwise it has a great picture but no High Definition.

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