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LG 27GL63T-B completely dead

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  • alex1918
    replied
    Как думаете, доска подойдет? https://30.img.avito.st/image/1/1.rU...V8VYggda6c-Fk?
    https://60.img.avito.st/image/1/1.7N...eRUkEu8ceMrds?
    https://00.img.avito.st/image/ 1/1.PUOMI7aNhaq6lBOn-jdgN4SB05ED5vGZD-P3zFzkopwM4qORCLKizAKyppwO46HJWOL2qA.Fm0PLbR9hb6MoB1AhMc13-mRSp9vTxxBTgL0I2adVJM?

    Leave a comment:


  • max-power
    replied
    I was having the same problem with a LG27GL650F that use the same board, I replaced the IC401 ( with the R414 fly off in the same time, it was fun to put it back ), and so 5$ on aliexpress and its working again, thanks

    Leave a comment:


  • Pandor
    replied
    I have a link up in post 85 for the ali platform. They go for around $20-35. Voveo also posted a taobao link.

    I'm curious as to what soldering technique voveo used.

    Unfortunately i can not find a replacement board for the life of me, so this is a last resort. If this doesn't work i'm binning the monitor.

    Leave a comment:


  • Dannyx
    replied
    How much was this ? I'm just curious if it's a viable option to fixing one of these (IF it works, that is). If it ends up costing half the price of a replacement board, factoring in the effort required to replace it, I'd say it's not worth it, especially since this is the second board that dies on me (or HIM, since it's my friend's )...

    Leave a comment:


  • Pandor
    replied
    Its finally here. At first glance, it looks fake (comparing the logo), but anyway. Wasn't aware this chip would have a bottom ground plane, so that's going to be a p.i.t.a. i'm not overly confident. I've done bga cpu's, but qfp chips don't tend to just flow in place under hot air... we'll see.

    Leave a comment:


  • lotas
    replied
    Originally posted by Dirk Basford View Post

    My monitor has crapped out also and I'm gonna take a stab at fixing it. I found the info for IC 401 but cant find the part number for IC402 in this thread. I see markismus' photos for ic labels but cant find the datasheets in his post. Anyway if anyone has the part number or a link to the part i need for IC402 IACGK that would be great!
    ACGx - MP24894GJ

    https://aliexpress.com/item/1005004986588777.html
    Attached Files

    Leave a comment:


  • Dirk Basford
    replied
    Originally posted by Pandor View Post
    markismus posted some great pictures with correct IC labels and datasheets, one page back.
    My monitor has crapped out also and I'm gonna take a stab at fixing it. I found the info for IC 401 but cant find the part number for IC402 in this thread. I see markismus' photos for ic labels but cant find the datasheets in his post. Anyway if anyone has the part number or a link to the part i need for IC402 IACGK that would be great!

    Leave a comment:


  • voveo
    replied
    Originally posted by Pandor View Post
    So, if I understand correctly. The low resistance on the memory power supply was not the issue? The low resistance measures the same on the new CPU? But replacing the CPU revived the screen? I'm currently waiting on my replacement MST9U35Q1 from aliexpress.
    Hello, sorry, I'm writing through a translator, the burned-out processor had 39 ohms when it was installed and 39 ohms when I dismantled it, on the new processor kilo-ohms

    Leave a comment:


  • Pandor
    replied
    Originally posted by voveo View Post
    Hello everyone, I'm sorry, I bought the processor on Taobao, I made the order to Germany through Ukraine, on the non-working processor there was a resistance of 39 ohms, on the removed processor the same 39 ohms were on the 106-107 leg, on the installed new processor and kilo-ohm PWM controller, https://ua-tao.com/ua/item/749397100...RfcHJpY2UiOjB9 https://item.taobao.com/item.htm?spm...cket=15#detail
    So, if I understand correctly. The low resistance on the memory power supply was not the issue? The low resistance measures the same on the new CPU? But replacing the CPU revived the screen? I'm currently waiting on my replacement MST9U35Q1 from aliexpress.

    Leave a comment:


  • voveo
    replied
    Hello everyone, I'm sorry, I bought the processor on Taobao, I made the order to Germany through Ukraine, on the non-working processor there was a resistance of 39 ohms, on the removed processor the same 39 ohms were on the 106-107 leg, on the installed new processor and kilo-ohm PWM controller, https://ua-tao.com/ua/item/749397100...RfcHJpY2UiOjB9 https://item.taobao.com/item.htm?spm...cket=15#detail

    Leave a comment:


  • Pandor
    replied
    Originally posted by voveo View Post
    Hello everyone, there was low resistance on the memory power supply pin on the processor, I ordered the processor from Alibaba and the PWM controller, I replaced it, everything works
    I'm afraid my problem is also the cpu. Do you have any resistance measurements with the new cpu?

    markismus this should work: https://a.aliexpress.com/_EuyUHWv

    Leave a comment:


  • markismus
    replied
    voveo Could you post links to your ordered ic's?

    Leave a comment:


  • voveo
    replied
    Hello everyone, there was low resistance on the memory power supply pin on the processor, I ordered the processor from Alibaba and the PWM controller, I replaced it, everything works

    Leave a comment:


  • falkikowski
    replied
    I think the locations of the external connectors are not the problem. New openings in the shell can be made and the old opening can be closed with 3d printed caps.

    But from what I saw on eBay listings the lvds connector to the panel seem to have different pin amounts and different connectors.
    Even if the pin amount is correct I'm not sure how well the connector can by adapted.

    Often the other board are layout for eDP and LVDS 41 pin and 51 pin, but not all connectors are soldered onto the board. And often the boards have FFC or FPC connectors. I'm not sure what connector is on our boards, maybe the JAE FI-E.

    Leave a comment:


  • alex1918
    replied
    Compatible with my monitor. Connector locations are different https://60.img.avito.st/image/1/1.r0...ePXQmQIR8-yrVU
    https://60.img.avito.st/image/1/1.BX...JP1LefPFcHN_5A

    Leave a comment:


  • Vesko356
    commented on 's reply
    This is an english language forum, post in English please!

  • alex1918
    replied
    Приветствую.скажите с кой модели может подойти плата .точно подойдет LG 27GN750 .может еще есть




    Greetings. Tell me is there any other model that has the same board? The LG 27GN750 will definitely fit. Maybe there's more?
    Last edited by Vesko356; 02-08-2024, 10:14 AM. Reason: English translation.

    Leave a comment:


  • Pandor
    replied
    Originally posted by markismus View Post
    Pandor How did you know how to wire it up? Couldn't find anything in the 29gl850 service manual. A logic analyzer is new to me. Nice! But at least I would understand how you got the pinout.
    The 27gl850 service manual posted on the first page is virtually identical, minus the USB and buzzer stuff. most of the schematic matches the 27GL650 board we have. I've been using it as a reference.
    Here's the UART part:
    Attached Files

    Leave a comment:


  • falkikowski
    replied
    Hi,
    I find the service manual for the 24GL600 quite helpful. The naming is not 100% correct but the voltages seem to match.

    I swapped the IC401 and the 12 MHz quartz and getting the right voltages on that coils, but I get no high signal on the pin 2 of the LED driver IC.

    Do you think it is possible to check the IC200 and reflash it?
    Or is it alternatively possible to get a hole new board that just works with that panel?
    Attached Files

    Leave a comment:


  • markismus
    replied
    Pandor How did you know how to wire it up? Couldn't find anything in the 29gl850 service manual. A logic analyzer is new to me. Nice! But at least I would understand how you got the pinout.

    Leave a comment:

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