Windows 10: PS/2 Keyboard on lenovo 81n3 stopped working after update.

Discus and support PS/2 Keyboard on lenovo 81n3 stopped working after update. in Windows 10 Drivers and Hardware to solve the problem; Touchpad mouse works as does on screen keyboard. Have tried disabling keyboard at device manager and rebooting. Still shows yellow triangle with !... Discussion in 'Windows 10 Drivers and Hardware' started by WarrenAndrews1, Oct 9, 2019 at 12:07 AM.

  1. PS/2 Keyboard on lenovo 81n3 stopped working after update.


    Touchpad mouse works as does on screen keyboard.

    Have tried disabling keyboard at device manager and rebooting.

    Still shows yellow triangle with !

    Message is 'windows cannot verify digital signature'

    3 drivers shown

    DRIVERS\i8042prt.sys

    DRIVERS\kbdclass.sys

    drivers\SynTP.sys

    I've run out of ideas and would appreciate suggestions.

    W

    :)
     
    WarrenAndrews1, Oct 9, 2019 at 12:07 AM
    #1

  2. PS/2 keyboard not working

    Question:- does a laptop keyboard use PS/2 interface or other?

    My problem:- PS/2 desktop keyboard has stopped working; reseated PS/2 connection - same problem. The computer knows when keys are pressed because the speakers issue a click BUT characters aren't forthcoming.

    WORKAROUND

    Start the virtual keyboard and hey-presto - the physical keyboard springs into life (you can tell because the caps-lock light suddenly starts working.)

    Really weird. The PS/2 mouse is fine. To cut our losses I'll try a USB keyboard tomorrow.
     
    Computerabber, Oct 9, 2019 at 12:10 AM
    #2
  3. ps/2 keyboard not working after Windows 10 update

    Windows 10 pro was working fine until the last update (Feature update to Windows 10, version 1803)
    (Version 1803 (OS Build 17134.191)). Now the ps/2 keyboard can not start (code10). A USB keyboard works. If I go into Device Manager and uninstall the ps/2 keyboard then scan for hardware changes the ps/2 keyboard starts working but the USB keyboard and
    USB mouse stop working. Dell Precision T7400
     
    RaymondFrenkel, Oct 9, 2019 at 12:10 AM
    #3
  4. PaulKowit Win User

    PS/2 Keyboard on lenovo 81n3 stopped working after update.

    Lenovo PS/2 Keyboard Issues w/ Windows 10

    I currently have a Lenovo Yoga 3 Think Pad running Windows 10.

    My PS/2 keyboard sporadically stops working while I am trying to type and it makes it very difficult to use.

    I talked to Lenovo and there diagnosis is that it is not a hardware issue. Since all my drivers are up-to-date, I am wondering if anybody may know a solution.

    -Paul
     
Thema:

PS/2 Keyboard on lenovo 81n3 stopped working after update.

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