840 g2 keyboard problem

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • estabilito
    Senior Member
    • Aug 2020
    • 54
    • poland

    #1

    840 g2 keyboard problem

    I have 6050a2637901-mb-a02 840 g2 hp elitebook with keyboard problem:
    some keys doesn't work even on 100% working keyboard (tested on another laptop) - i've replaced KBC and problem still exist. On external keyboard every key is working. What can i do more? keyboard driver uninstall tested too.
  • reformatt
    Badcaps Legend
    • Feb 2020
    • 1400
    • Australia

    #2
    Re: 840 g2 keyboard problem

    I had something like this on a HP 450 G3 with a Nuvoton EC. I replaced that EC and the keyboard and it was working until I put it fully back together. The fault was caused by the WIFI and Sound button board. When that was connected, it interfered with the EC scan lines I believe. Fault disappeared when this button board was replaced. I don't know what the fault was with that board.

    So try disconnecting other things to the mobo and see if fault goes away. Of course I am making the assumption you've buzzed out all the scan lines from the EC to the keyboard connector correct?
    Last edited by reformatt; 11-21-2021, 02:04 AM.

    Comment

    • estabilito
      Senior Member
      • Aug 2020
      • 54
      • poland

      #3
      Re: 840 g2 keyboard problem

      yes - ill try this, thanks

      Comment

      Related Topics

      Collapse

      • MrDadosz
        Lenovo Legion 15IMH05 keyboard problem
        by MrDadosz
        Hello, I have lenovo legion 5 15imh05 (board: nm-c911) and I have a problem with a keyboard.
        When I hold power button for ~30 seconds or unplug RTC battery keyboard will work only one time. After laptop reset or shutdown, keyboard won't work.
        In 90% cases when I unplug power supply and turn on laptop on a battery, keyboard works even after plugging power supply - I can't turn on laptop with a power supply and get keyboard working.
        Shortcuts Fn + F1-F12 are working. Keyboard is fine.
        I replaced IT8176FN-56A and reprogram it with a dump from previous chip and it worked for...
        08-15-2024, 05:07 AM
      • fmajbour
        Acer Nitro 5 model A515-51 keyboard problem
        by fmajbour
        I have ACER Nitro 5 model AN515-51 main board model LA-E911P Rev 1A after replacing the mainboard keyboard stop working properly.
        Some keys not working like Q,Z,C and some keys show deferent chr$ if i press K i will get I press D for F4 key etc...
        i have tried all software issues like drivers test the keyboard on Windows 10 and Windows 11 and Linux with same problem.
        I have check the keyboard connector on the mainboard every thing looks ok.
        Then i replaced the keyboard with new one ......same problem exact same keys problem.
        I need your advice if anyone face...
        11-13-2023, 09:50 PM
      • Document Archive
        HP ProBook 450 G5 + Essential 15.6-inch Case, Keyboard & Mouse Notebook 400 Specification for Upgrade or Repair
        by Document Archive
        This specification for the HP ProBook 450 G5 + Essential 15.6-inch Case, Keyboard & Mouse Notebook can be useful for upgrading or repairing a laptop that is not working. As a community we are working through our specifications to add valuable data like the 450 G5 + Essential 15.6-inch Case, Keyboard & Mouse boardview and 450 G5 + Essential 15.6-inch Case, Keyboard & Mouse schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users...
        09-06-2024, 06:21 AM
      • Document Archive
        HP ProBook 430 G5 + Essential Top Load Case + USB Essential Keyboard & Mouse Notebook 400 Specification for Upgrade or Repair
        by Document Archive
        This specification for the HP ProBook 430 G5 + Essential Top Load Case + USB Essential Keyboard & Mouse Notebook can be useful for upgrading or repairing a laptop that is not working. As a community we are working through our specifications to add valuable data like the 430 G5 + Essential Top Load Case + USB Essential Keyboard & Mouse boardview and 430 G5 + Essential Top Load Case + USB Essential Keyboard & Mouse schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you...
        09-06-2024, 06:21 AM
      • Document Archive
        HP ProBook 430 G5 + Essential 15.6-inch Case, Keyboard & Mouse Notebook 400 Specification for Upgrade or Repair
        by Document Archive
        This specification for the HP ProBook 430 G5 + Essential 15.6-inch Case, Keyboard & Mouse Notebook can be useful for upgrading or repairing a laptop that is not working. As a community we are working through our specifications to add valuable data like the 430 G5 + Essential 15.6-inch Case, Keyboard & Mouse boardview and 430 G5 + Essential 15.6-inch Case, Keyboard & Mouse schematic. Our users have donated over 1 million documents which are being added to the site. This page will be updated soon with additional information. Alternatively you can request additional help from our users...
        09-06-2024, 06:21 AM
      • Loading...
      • No more items.
      Working...