Results 1 to 9 of 9
  1. #1
    Junior Member
    Join Date
    Feb 2018
    Posts
    18
    Thanks
    0
    Thanked 1 Time in 1 Post

    00165 - Trackpad works Keyboard doesn't

    I have a riddle for you: the trackpad works everywhere (efi and os) and the keyboard works nowhere. The power button works and SMC reset even works but not boot options, not nvram, and none of the keys except power work. No liquid damage, tried new keyboard. I'm stumped.

  2. #2
    Senior Member
    Join Date
    Mar 2015
    Location
    Cheshire
    Posts
    361
    Thanks
    48
    Thanked 59 Times in 46 Posts

    Re: 00165 - Trackpad works Keyboard doesn't

    Have you tried another trackpad?

  3. #3
    Junior Member
    Join Date
    Feb 2018
    Posts
    18
    Thanks
    0
    Thanked 1 Time in 1 Post

    Re: 00165 - Trackpad works Keyboard doesn't

    Yup. Tried new trackpad same behavior: tpad works everywhere, keyboard works nowhere. Power button and smc reset lines work.

  4. #4
    VIP Member
    Join Date
    Nov 2014
    Location
    UK
    Posts
    1,097
    Thanks
    239
    Thanked 175 Times in 149 Posts

    Re: 00165 - Trackpad works Keyboard doesn't

    Check the keyboard connector on the board with a microscope.
    Also check the ribbon cable from the board to the trackpad.

  5. #5
    Junior Member
    Join Date
    Feb 2018
    Posts
    18
    Thanks
    0
    Thanked 1 Time in 1 Post

    Re: 00165 - Trackpad works Keyboard doesn't

    Tried KG tpad cable when I tried KG keyboard/trackpad. I'll take some measurements on the trackpad connector but it looks good under the microscope. It would seem we've ruled out keyboard and trackpad and trackpad cable problems (parts problems) and it has to be the board. What's strange is that the trackpad has 5v, 3.3v, 3v42 where expected. And the keyboard gets processed on the trackpad and the data just comes straight over the connector.

  6. #6
    Junior Member
    Join Date
    Feb 2018
    Posts
    18
    Thanks
    0
    Thanked 1 Time in 1 Post

    Re: 00165 - Trackpad works Keyboard doesn't

    Tpad conn (J4800) voltage on login screen:
    1 - 3.42
    2 - 0.11
    3 - 0.0
    4 - 0.19
    5 - 0.30
    6 - 0.0
    7 - 0.0
    8 - 0.0
    9 - 0.004
    10 - 3.31
    11 - 3.18
    12 - 3.31
    13 - 3.11
    14 - 5.11
    15 - 0
    16 - 3.30
    17 - 3.30
    18 - 3.39
    19 - 3.42
    20 - 3.38

  7. #7
    VIP Member
    Join Date
    Jan 2016
    Location
    Budapest, Hungary
    Posts
    650
    Thanks
    12
    Thanked 139 Times in 113 Posts

    Re: 00165 - Trackpad works Keyboard doesn't

    Have you tried a fresh install OS from internet recovery? It's alt+cmd+R.
    Do it with an external keyboard, also PRAM reset.
    If not I would put a fresh bootrom image in the BIOS.

  8. #8
    Junior Member
    Join Date
    Feb 2018
    Posts
    18
    Thanks
    0
    Thanked 1 Time in 1 Post

    Re: 00165 - Trackpad works Keyboard doesn't

    I reinstalled the OS to flash the firmware. No change.

  9. #9
    Senior Member
    Join Date
    Feb 2016
    Posts
    332
    Thanks
    9
    Thanked 23 Times in 18 Posts

    Re: 00165 - Trackpad works Keyboard doesn't

    Verify R4850, 4851, 4852 and 4053 area and traces

 

 

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •