8770W non dreamcolor to dreamcolor upgrade

Discussion in 'HP' started by Koniptn, Nov 21, 2018.

  1. Koniptn

    Koniptn Notebook Enthusiast

    Reputations:
    0
    Messages:
    41
    Likes Received:
    15
    Trophy Points:
    16
    I'd like to preface this with I am extremely new to monitor tech, and especially the communications standards (just learned about LVDS and eDP today, 11/24/18)

    Update: Unfortunately, I stepped on and broke the screen in my laptop. It was a non-dreamcolor, so I will work to find a replacement.

    Purchased a 970m from dell to upgrade the GPU in my 8770w (C6Y81UT, recent motherboard replacement with HP Part 688746-001) from an AMD M4000 to a GTX 970M 6G from Dell (hopefully no vBIOS flash needed)

    Goal 1: Locate a 17.3 10bit QHD 120hz LVDS panel to replace the17.3 6bit FHD 60hz LVDS panel in my 8770w : FAILED - QM77 Express chipset (2012 release date) only supports eDP v 1.1. Therefor, it is not possible to have greater than 1920x1200@60 in this laptop.

    INTEL QM77 Express datasheet:

    https://www.mouser.com/pdfdocs/7serieschipsetpchdatasheet.pdf

    Best panel discovered: http://www.panelook.com/B173QTN01.2_AUO_17.3_LCM_overview_31905.html - unfortunately, this panel is eDP only, does not accept LVDS signals.

    Stats: 8bit QHD 120hz eDP 93% sRGB Alienware 17 R4 uses this or a variant of it, and I believe the Aorus X7 does as well.

    Ok, so here is what I've discovered:

    There are no LVDS panels that are QHD, period. They just don't exist.

    There are no 10bit IPS 17.3 inch QHD 100+hz refresh rate panels out there. Best I found was 8bit QHD 17.3 120hz TN panel, with 93% sRGB coverage here: http://www.panelook.com/B173QTN01.2_AUO_17.3_LCM_overview_31905.html

    According to some research I found here: https://www.usmicroproducts.com/blog/understanding-display-interfaces LVDS supports a max of 3.125GB/s. QHD@120 would be 13.27Gbps, or 1.65GB/s. Well within the capabilities of LVDS, but I am unable to find any monitor in existence that runs at that resolution/refresh and uses the LVDS standard.

    There are chips out there, the STDP4028AB (lvds to eDP, supports WQXGA and QSXGA 10bit @ 60) and the STDP8028AB (eDP to LVDS, WUXGA 10bit @ 60) for supporting conversions.



    Goal 2: Get a dreamcolor panel

    After doing much reading, I stumbled across several mentions that:

    If the laptop was not originally dreamcolor, you'll need the specific colorboard(not sure what that is) for dreamcolor screens.
    The DreamColor monitor also requires a 50pin cable
    There were also several mentions of needing an entirely different motherboard alltogether, one that supports dreamcolor, which I've been unsuccessful in locating a part number for. This information seems conflicting with info that says you don't actually need a motherboard, just a decoder.


    I found this part number (STDP8028) in this thread: http://forum.notebookreview.com/threads/hp-8770w-dreamcolor2-lcd-upgrade.822223/

    A search on Ebay brought up:
    https://www.ebay.com/itm/1pcs-STDP-...h=item1caf0dfe0f:g:2bgAAOSwhT1bJgUJ:rk:2:pf:0

    As a techie, sense is telling me this isn't everything I need to take care of connecting to the system. This just looks like the IC, and seems to be steering me into the direction of removing the old IC from the laptop's colorboard (I still don't know what that is) and replacing it with this. Seems drastic, and also doesn't cover the potential of the cable having more pins than the colorboard supports.

    Question: is that *all* I need to be able to use a 10bit IPS monitor, or will I actually need an entire colorboard with the capable decoder already on it?

    The cable needed to connect the monitor to the motherboard is apparently here: https://item.taobao.com/item.htm?sp...ZzU2g8&id=573433648489&ns=1&abbucket=3#detail -- Thank you to @oyasumi

    Still missing the cable from the colorboard to the monitor.

    Found more information here: http://forum.hpfocus.com/viewtopic.php?t=2656

    Might be able to get remaining parts for dreamcolor stuff there
     
    Last edited: Nov 27, 2018
    sicily428 and triturbo like this.
  2. triturbo

    triturbo Long live 16:10 and MXM-B

    Reputations:
    1,576
    Messages:
    3,789
    Likes Received:
    1,209
    Trophy Points:
    231
    You are right, the one you found is just the IC, the board has it and gets the (DP) signal from the MoBo, converts it (to LVDS) (also stores color presets) and sends it to the display. Cables are the most difficult things to find (next to impossible, other than TaoBao), then colorboard (again next to impossible, other than TaoBao), while the display is relatively easy find (whether or not good quality is another story).

    Nice story about the QHD as well.

    In any case - Good luck and happy upgrading! Getting a better display is worth it!
     
  3. bodwear

    bodwear Newbie

    Reputations:
    0
    Messages:
    2
    Likes Received:
    0
    Trophy Points:
    5
    I modified my 8770w to a DreamColor display in 2015. I bought all the parts mentionned on taobao thx to a taiwanese friend (as I am in switzerland). Everything went well.
     
  4. pr0ton93

    pr0ton93 Newbie

    Reputations:
    0
    Messages:
    8
    Likes Received:
    0
    Trophy Points:
    5
    Interesting, can you give us a link to which parts you ordered?
     
  5. Bbv66wuw

    Bbv66wuw Notebook Enthusiast

    Reputations:
    0
    Messages:
    28
    Likes Received:
    1
    Trophy Points:
    6


    Yes! "Interesting, can you give us a link to which parts you ordered?"
     
Loading...

Share This Page