HP 8770w DreamColor2 LCD Upgrade

Discussion in 'HP Business Class Notebooks' started by oyasumi, Aug 20, 2018.

  1. oyasumi

    oyasumi Newbie

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    I am trying to upgrade my 8770w's LCD to a Dreamcolor one, and I have bought a decoder board (STDP8028) along with the DC cable, and a LP173WF3-SLB4 screen. I have the laptop taken apart to install all the parts but I'm having trouble understanding how the cabling should work. I'm pretty sure the DC cable connects to the LCD and the decoder/color board, and the other cable connects to the motherboard and another (50-pin?) connector on the color board.

    What I'm having a problem with is that the original motherboard/display cable is a 40-pin connector, so I'm not sure if I need some kind of 40-pin to 50-pin adapter or what. Given the past posts on this site, I thought I had everything I need, but that is apparently not so. What am I missing here? Thanks in advance
     
  2. kamilo23

    kamilo23 Notebook Geek

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    You need different cable to the motherboard.
     
  3. oyasumi

    oyasumi Newbie

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    Kamilo,
    Thanks for your reply. I've since realized that, and I'm now a proud owner of a DC2 8770w :)

    One question though, would you happen to be aware of a buzzing noise coming from a DC2 screen? I have to say it's bugging me.
     
  4. kamilo23

    kamilo23 Notebook Geek

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    Yes I'm aware of that sound. :)
     
  5. Koniptn

    Koniptn Notebook Enthusiast

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    Hi oyasumi,

    What cable did you need to connect the screen to the motherboard?

    I have a non-dreamcolor version of the 8770w, but the monitor connection on the motherboard is a 50 pin. I assume only 40 of those pins are actually in use with my current monitor, and it is likely that the wires for the last 10 pins are probably also not present in the cable.
     
  6. oyasumi

    oyasumi Newbie

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    You need to buy another cable. There’s one on taobao that you can buy for about ~25
     
  7. Koniptn

    Koniptn Notebook Enthusiast

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    Could you provide a link or part number please?
     
  8. oyasumi

    oyasumi Newbie

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  9. Koniptn

    Koniptn Notebook Enthusiast

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  10. Koniptn

    Koniptn Notebook Enthusiast

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    @oyasumi

    Since you're here and active, I'd like to pick your brain real quick.

    According to Panelook, the LP173WF3-SLB4 is a LVDS interface 40pin monitor.

    The decoder board you said you found, the STDP8028 has a datasheet, here: https://datasheet.octopart.com/STDP8028-AB-STMicroelectronics-datasheet-16348559.pdf

    Forgive me, I'm new at this, but from what I understand, this takes DP/HDMI/DVI *input* and converts it out to LVDS output. It supports a maximum output of WUXGA (1920x1200) @606320

    I am super confused though, because I thought the motherboard was only capable of LVDS based output.

    How did you get this to work? Did you build a converter board using this chip? Did the chip come on a converter board already with the correct pinouts?
     
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