Acer E5-511-C0PC-CA cannot press L-Shift, 6,8,9,0, F2, F11 and from the numpad key 1

keyman
keyman Member Posts: 17

Tinkerer

edited October 2023 in 2020 Archives
try many ways as posted but no luck, do not think it is dust related and it was totally working fine before and suddenly only those keys are not available. cannot use functional key to enter bios either.
also the mouse touch pad does not work either
external keyboard works fine.

any help will be appreciated!
«1

Answers

  • JackE
    JackE ACE Posts: 45,080 Trailblazer
    Sounds like the KB and TP ribbon cable connectors need to be re-seated on the top of the mainboard a few times to clean the contacts. Unfortunately, the base cover, upper case, keyboard, dvd must be removed in order to access these connectors. Google the keywords 'e5-511' & 'disassembly' to see videos on what you'll be up against. Jack E/NJ



    Jack E/NJ

  • keyman
    keyman Member Posts: 17

    Tinkerer

    Thanks Jack, it actually has been done but the wired thing is only those keys not working
  • keyman
    keyman Member Posts: 17

    Tinkerer

    it actually was done see image thanks



  • keyman
    keyman Member Posts: 17

    Tinkerer

    hoe many times need to reserlt? there are four connectors and both connect keyboard and motherboard, one from power to close to a battery, one from top to connect to hard drive and one black
  • JackE
    JackE ACE Posts: 45,080 Trailblazer
    edited December 2020
    I usually re-seat a half-dozen or so times. Sometimes clean the exposed contacts with a q-tip moistened with rubbing alcohol. All my keyboards and touchpads have the integrated ribbon so only the mainboard connector to worry about. The small sliding wedges that press against and lock the mainboard & ribbon contacts together sometimes get misaligned and don't make good connections across all the contacts. I usually have to push both ends of the wedge with equal pressure with sharp tools to get the wedge fully inserted parallel to the connector. You really need two pairs of hands sometimes. :#   Jack E/NJ  

    Jack E/NJ

  • keyman
    keyman Member Posts: 17

    Tinkerer

    Really appreciate your help jack.  also the problem is after reseating the connector, you need to put all screws to test otherwise the keyboard won't work if not sticky to mother board so anyway to quickly test it before assembling back a dozen times?
  • JackE
    JackE ACE Posts: 45,080 Trailblazer
    edited December 2020
    No! I don't try to test it after each and every re-seat. I just pull it out and push it back in several times just to physically abrade the contacts from the friction of pulling it in and out. Almost like sandpapering the contacts but using the ribbon connector end itself as the sandpaper. Jack E/NJ

    Jack E/NJ

  • keyman
    keyman Member Posts: 17

    Tinkerer

    so need to connect and disconnect both upside (to the keyboard) and downside (connect to mother board) like ten times for three sets of connectors?
  • keyman
    keyman Member Posts: 17

    Tinkerer

    have reconnect thw blue one to synoptics few times
  • keyman
    keyman Member Posts: 17

    Tinkerer

    on the motherboatd side 
    the left narrow blue cable connector seems a little lose
  • keyman
    keyman Member Posts: 17

    Tinkerer

    edited December 2020
    the very right side black big cable seems to have sliding part under white part, where to "sand" it? (on the top of picture there is a black thin line on top of white connector) thanks
  • JackE
    JackE ACE Posts: 45,080 Trailblazer
    The wide cable is pushed under the gray slider wedge and held there with one hand. There should be a line stripe on the ribbon that, when lined up with the white stripe on the mainboard, indicates it's fully inserted. Then the slider wedge is pushed in at each end so it locks the ribbon in place while pressing it's contacts against the corresponding mainboard contacts. Jack E/NJ

    Jack E/NJ

  • keyman
    keyman Member Posts: 17

    Tinkerer

    no luck aftet trying reseating several times still the same problem

  • keyman
    keyman Member Posts: 17

    Tinkerer

    actually not sure how to put the black connector under as the space is between the white and grey slider?
  • keyman
    keyman Member Posts: 17

    Tinkerer

    if put black one under grey slider the keyboard is completely dead with no response
  • keyman
    keyman Member Posts: 17

    Tinkerer

    looks like getting worst after plug and unplug the cables as more keys are not responding
  • JackE
    JackE ACE Posts: 45,080 Trailblazer
    Can you pull the slider out a bit to see if you can actually  see if the contacts are  on the mainboard or on the upper inside part of the white mainboard connector? Usually they're on the mainboard. What about the contacts on the cable itself? Do the gold colored metal contacts face up or face down toward the mainboard? Jack E/NJ

    Jack E/NJ

  • keyman
    keyman Member Posts: 17

    Tinkerer

    noticed when trying to bend the keyboard a little bit and hd the second blue cable . it was working but put it togethet on mother board flat then does not. Not always but some indication
  • keyman
    keyman Member Posts: 17

    Tinkerer

    still think the problem is around second white cable with tp on it,not sure if get it connect rigjt
  • keyman
    keyman Member Posts: 17

    Tinkerer

    weird findings when bend the black width cable towards the hdd and hold it then all keyboard keys work :o