LG Main Board Cross Compatibility

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  • midnightg35x
    Senior Member
    • Apr 2013
    • 58
    • USA
    #1

    LG Main Board Cross Compatibility

    I have an LG 55LS4500 TV that has a shorted out main SoC on the main board. It was hit by some sort of power surge. It isn't practical for me to replace just the main IC which controls almost every function of the TV. I have found many used main boards with the same PWB number (EAX64437505) but from different panels. The sticker on my main board has EBR75708201 on it along with the model number 55LS4500-UD. The sticker on the main board I want to replace it with is EBR75177903 from a 42LS3400. All of the physical components look correct. If I had to guess, the firmware or something in the service manual would be the only difference but I am not sure.

    Could I just either transfer the EEPROM (IC5601) chip from my main board to the new one or perhaps just update the firmware somehow? I don't have the LG service remocon that the service manual talks about for the service menu. IC5601 is the EEPROM shopjimmy sells and I could transfer that over to the new board easy enough.
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