SP314-54N touch screen doesn't work (after replacement)

Robin22
Robin22 Member Posts: 4 New User

Hello 

I have two Acer SP314-54N.


Since I broke one of my display, 

I experimentally replaced my LCD with SP314-21N 's lcd.

(because 54n and 21n both have wacom pen)
But that sp314-21N's one does not fit with 54N.

Right after I replaced 21N's one on 54N, It automatically did a system update.



After I bought SP-314 54N's new LCD display, I put it on.


But the touch function does not workand the highest resolution was only 1366 x 768


Since I have the same SP314-54N (can touch) , I could compare the SW both of them.


<difference on SW>

1. On windows10> device manager : HID touch screen driver disappeared.







2. Win10 > System > display : the oem19.inf  has been replaced by oem17.inf




<Other things of 54N(which cannot touch) >

- I did BIOS downgrade V1.12

 - I re updated BIOS to V1.13 



How can I re-use my touch function ?



Best Answer

  • Leostat
    Leostat ACE Posts: 3,043 Pathfinder
    Answer ✓

    Deffo not , just like trying to help people out 💗 Glad its now working :), the ebay seller may have short changed you!

Answers

  • Leostat
    Leostat ACE Posts: 3,043 Pathfinder

    With this one, is the touch off a seperate header or is it fed off the eDP cable? Im wondering if a cable isnt seeted properly

  • Hello! Can you provide the IDHARDWARE of this device?

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  • Robin22
    Robin22 Member Posts: 4 New User

    @egydiocoelho

    Thanks for your help

    I've took pictures of that I2C HID.

    Not only HW ID,

    I took pictures of useful information of that module.(problem statue says it has POWER FAILURE : c000009e)

  • Robin22
    Robin22 Member Posts: 4 New User
    edited May 2023

    @Leostat Thanks for your help

    Yes it seems touch function comes from E-DP cable

    and of course I re-assembled that E-DP two times.

    It has 4 cables from LCD,

    1,2 : Black&White one : black for main, white for Aux

    3: edp cable

    4. Lenny G-Sencable

  • Leostat
    Leostat ACE Posts: 3,043 Pathfinder

    Do you ave a part numberfor the screen? It looks like there is a screen for the 21N donor laptop which has a 1366 x 768 res and a differnt pin out which could be the reason! This one runs off one eDP lane so im wondering if this is the culprit

    There isnt an electrical pin out that i can see at the moment but still looking, it could be that data is on a differnt pin for the two screens

  • Robin22
    Robin22 Member Posts: 4 New User

    @Leostat
    Are you a genius? Problem solved. Thanks.

    The problem was that LCD isn't compatible with SP314-54N. (Rhater 21N or etc)

    https://www.ebay.com/itm/295469407614

    the new LCD is frome ebay.

    Your comment gave me an ideat that replace the display of both of them.

    It perfectly worked with my original LCD.

    Which means that ebay one does not compatible with 54N.

    So much thanks for all of you :)

  • Leostat
    Leostat ACE Posts: 3,043 Pathfinder
    Answer ✓

    Deffo not , just like trying to help people out 💗 Glad its now working :), the ebay seller may have short changed you!