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LG 60pz750

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    #1

    LG 60pz750

    I just fixed this model, had the cracked solder joints on the coils of both z sus and y sus, with only 3 shorted igbts. I replaced them and another 3 FGPF4633 with 6 gt30j124 (I wanted to try them, overkill but cheap) The main fuse on the z sus was blown also.
    The tv fired right up and I scanned for channels, and all was great. This morning I put a usb drive with a movie on it and it played perfectly. I changed inputs back to tv and no signal on all 42 that I can get!!! Hdmi and the usb port still work.
    I am going to try a firmware update on it, and then maybe a factory reset if needed.
    Has anybody solved this issue? Mainboards are extinct for this set, only repair services from e bay. Will post results.
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    #2
    Re: LG 60pz750

    Originally posted by tvtimmy View Post
    I just fixed this model, had the cracked solder joints on the coils of both z sus and y sus, with only 3 shorted igbts. I replaced them and another 3 FGPF4633 with 6 gt30j124 (I wanted to try them, overkill but cheap) The main fuse on the z sus was blown also.
    The tv fired right up and I scanned for channels, and all was great. This morning I put a usb drive with a movie on it and it played perfectly. I changed inputs back to tv and no signal on all 42 that I can get!!! Hdmi and the usb port still work.
    I am going to try a firmware update on it, and then maybe a factory reset if needed.
    Has anybody solved this issue? Mainboards are extinct for this set, only repair services from e bay. Will post results.
    I dunno, $300 bucks gets you a new board.

    https://encompass.com/item/9629263/L...assis_Assembly

    I'd be tempted to reflow or replace the tuner module. I've had a PK750 with a bad one, hardly picked any channels up or displayed bad signal quality, broke up a lot. Replaced the module and fixed. Was not a Sanyo module but could be similar internals

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      #3
      Re: LG 60pz750

      those sets are notorious for having the main chip in the main board fail... you can sometimes get the set to work correctly but heating the chip with a heatgun to troubleshoot but the issue will return unless its repaired... BTW you can get these boards repaired on ebay for like $75...
      #1 issue is a lit up blank screen.

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        #4
        Re: LG 60pz750

        A reflow of the bga chip did the trick.

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