Clevo P775DM3-G: LCD cable replacement instructions?

Discussion in 'Sager and Clevo' started by Terry Payman, Feb 19, 2021.

  1. Terry Payman

    Terry Payman Notebook Enthusiast

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    Clevo P775DM3-G with the 4k LCD screen (PC Specialist 17.3" Octane III)

    I think I have a fractured LCD cable, and need to replace it. The screen has been progressively more erratic (freezing, fading) depending on angle of opening the lid, and is now virtually unusable.

    Can anyone help with instructions detailing exactly what I need to dismantle to gain access for replacing the cable? I couldn't find anything on this forum, I find the manual's assembly drawing too daunting and have failed to find a YouTube video

    Cable part number & service manual details, in case useful to someone else with the same problem:
    I ordered and received what I hope is a suitable 40-way replacement cable 6-43-P7751-020-1L: https://www.ebay.co.uk/itm/FOR-CLEV...EEN-CABLE-6-43-P7751-020-1L-Cdja/274400916635

    Only later did I find the P775DM3-G service manual* which lists the LCD cable with a slightly different suffix, -020-N vs -020-1L, (manual p54 Fig A-4 LCD (AU) Assembly drawing, item 23)

    * https://premamod.wordpress.com/ Maintenance > Service Manuals > P7 Series > P7xxDM3(G)
    (Thanks to Dr. AMK for posting about this awesome Prema Mod resource)
     
  2. thewizzard1

    thewizzard1 Notebook Geek

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    This is a complex procedure, I would not recommend DIY if you're not well versed in laptop disassembly. I also believe you want the 30-pin job, but official support can chime in with correct part numbers.

    You'll have to take the laptop down to the motherboard, and separate the motherboard from the top housing, which is 20+ screws. You'll then disassemble the LCD housing, pop out the LCD, and carefully peel back the tape holding the LVDS connector in and swap it out from there, and then reverse the whole procedure.

    I'd strongly recommend bringing this to a mom + pop repair shop, I would NOT trust this to corporate / retail tech support.
     
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  3. joluke

    joluke Notebook Deity

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    The disassembly of the laptop is not a difficult procedure, it's more at being careful and not force anything out. You have the service manual with the procedure to follow to disassemble the whole machine. Just follow it. It's not rocket science, not even close. I've disassembled loads of Clevo's in 3 years apart from my model and the only thing I needed was to follow the service manual.

    View what LCD you have because there are 30 pin, 40 pin and 50 pin cables for various LCD'S. view the correct model so you can receive help.
     
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  4. Terry Payman

    Terry Payman Notebook Enthusiast

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    Many thanks for the advice guys. If our local repair shop was open I'd be tempted to take the laptop down there. Unfortunately they're closed during lockdown, so my options are to send it back to PC Specialist or fix it myself.

    I originally checked the required cable very carefully, but I'll double-check. From memory, the 30-pin cable was for the 1080p screen and the 40-pin for the 4k screen.
     
    Last edited: Feb 19, 2021
  5. joluke

    joluke Notebook Deity

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    Please install hwinfo and post here which monitor you have. I got a 1080p 40 pin LCD from AUO B173HAN03.1 which has g-sync and 144hz.
    Please see which one do you have so we can advice you the correct cable. Pc specialist are good professionals and a reliable store. They are the main seller and armazenist for Clevo's in Europe and you have XMG too as another option.
     
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  6. Terry Payman

    Terry Payman Notebook Enthusiast

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    OK, thanks. I'll do that tomorrow. I need to go to bed now - I've spent most of today chasing and collating info, ordering an anti-static mat, sourcing the specified screwdrivers etc and now my head hurts!
     
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  7. Terry Payman

    Terry Payman Notebook Enthusiast

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    Edited from HWiNFO64 Version 6.42-4360 log
    AU Optronics B173ZAN01.0
    Monitor Hardware ID: Monitor\AUO109B
    Digital Video Interface Standard Supported: DisplayPort.

    I'd very much appreciate your expert overview, but believe this confirms my choice of the 40-pin cable.
    If I follow a video on how to replace the screen, will it show me all I need to access both ends of the LCD cable?
     
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  8. Tech Junky

    Tech Junky Notebook Evangelist

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    https://www.panelook.com/modelcompare.php?ids=25358 << this is the panel you listed as currently installed.

    40 pins / 0.5 pin pitch

    As to replacement..... remove the current panel and follow the cable to the MOBO which will require removing the screws from both hinges to have clearance to pull the old cable out and pull the new cable through the same path. It's a balancing act with the main chassis and the lid when you have the hinges unscrewed but, if you take your time it's fairly simple to do w/o damaging anything in the process. Just reassemble in reverse.

    After you have the new cable connected to the MOBO and before you put everything back together fire things up with the new panel resting on the lid to make sure it's working and you don't end up having to pull everything apart again to troubleshoot a loose connection or a bad panel.

    If you prep everything you can get it done and reassembled in about 15-30 minutes.
     
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  9. Terry Payman

    Terry Payman Notebook Enthusiast

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    Many thanks to all. I now feel confident to tackle the job :)
     
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  10. Tech Junky

    Tech Junky Notebook Evangelist

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    Take a before/after photo to compare your results ;)
     
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