Problem with Zenithink c91 with touch screen

Discussion in 'Zenithink ZT280 C91 & C91 Upgrade' started by sob2012, Jun 20, 2012.

  1. sob2012

    sob2012 Member

    Joined:
    Jun 20, 2012
    Messages:
    2
    Likes Received:
    0
    Trophy Points:
    60
    Hi everyone !

    I have a tablet pc Zenithink c91 and i was happy for a 1 month.
    Some day I turn on the tablet and the touch screen don´t work. I need to connect a usb mouse for work with the table.

    I reset a tablet, use de option "restore factory settings" and the problem is the same..


    Someone can help me??..
     
  2. samy67

    samy67 Member

    Joined:
    Jun 23, 2012
    Messages:
    23
    Likes Received:
    0
    Trophy Points:
    60
    Location:
    Starsbourg
    Tablet / Device:
    Zenithink ZT-280 c91 upgrade
    Hi !

    wich version of the Zenithink have you? if it's the 3a , go to Zenithink, download the latest roms.
    when it done, you will have a folder name ""touch_firmware_for_3a", copy past all the file to the zt-update repository and flash your tablet

    it will be ok :)
     
  3. manohar2626

    manohar2626 Member

    Joined:
    Jul 17, 2012
    Messages:
    3
    Likes Received:
    0
    Trophy Points:
    60
    Location:
    Mumbai
    Tablet / Device:
    Zenithink ZT 2A C91

    Hi even I am facinng the same issue with my tablet, I hope you could help, I have a 2A version, and I also tried flashing my tablet by load the updated software from Zenithink website, but still I am facing the same issue, even I use usb mouse. Please help me. I even tried calibrating the touchscreen by pressing and holding the camera button, but nothing works...........
     
  4. samy67

    samy67 Member

    Joined:
    Jun 23, 2012
    Messages:
    23
    Likes Received:
    0
    Trophy Points:
    60
    Location:
    Starsbourg
    Tablet / Device:
    Zenithink ZT-280 c91 upgrade
    Hi the solution i ve done is for the 3a model.

    for your model i can't really help you.

    try to reflash your tablet again and again with different roms but still care for the 2n model.

    did you tried the android 2.3 version instead of ics 4.0.3?
     
  5. cumpek

    cumpek Member

    Joined:
    Jul 20, 2012
    Messages:
    1
    Likes Received:
    0
    Trophy Points:
    60
    I have the same problem - any other ideas? (C91 - 1G+8G)
     
  6. Flauzer

    Flauzer Member

    Joined:
    Jul 21, 2012
    Messages:
    3
    Likes Received:
    0
    Trophy Points:
    60
    Location:
    c:\windows\system32
    Tablet / Device:
    ZT ICS C91 Upgrade | M3C91-8Gb-1a-H3 Android 4.0.3 | Kernel 2.6.34
    Me too.

    My screen stopped working after 3 weeks and after a full charge.

    The touchscreen and the 4 side "buttons" are completely inert. CapTouch completely useless as Camera button as well.

    I don't know if the problem is hardware or software:
    ie someone has successfully installed the latest firmware against this problem ?

    Thanks in advance
     
  7. samy67

    samy67 Member

    Joined:
    Jun 23, 2012
    Messages:
    23
    Likes Received:
    0
    Trophy Points:
    60
    Location:
    Starsbourg
    Tablet / Device:
    Zenithink ZT-280 c91 upgrade
    have you reset the tablet?
     
  8. Flauzer

    Flauzer Member

    Joined:
    Jul 21, 2012
    Messages:
    3
    Likes Received:
    0
    Trophy Points:
    60
    Location:
    c:\windows\system32
    Tablet / Device:
    ZT ICS C91 Upgrade | M3C91-8Gb-1a-H3 Android 4.0.3 | Kernel 2.6.34
    yes...but without result.


    I was wondering if anyone has installed the latest firmware (July) to fix it.
     
  9. homesanto

    homesanto Member

    Joined:
    Jul 21, 2012
    Messages:
    1
    Likes Received:
    0
    Trophy Points:
    60
    Location:
    Spain
    Tablet / Device:
    Zenithink ZT282 C91 Upgrade (H3 1a)
    I'm afraid same problem here. I must plug USB mouse in order to turn it off properly. First I tried by reseting then I installed latest firmware from Zenithink. Finally I checked touch screen connections inside. Nothing worked, capacitive screen is gone. Yesterday I contacted someone experiencing that problem too. He's even published on Youtube as an evidence for Chinese dealer:



    Actually he said it's capacitive screen failure, nothing to fix. Tt should be serviced or sent it back to China. Do you agree?
     
    Last edited by a moderator: Jul 29, 2014
  10. benadlam

    benadlam Member

    Joined:
    May 6, 2012
    Messages:
    132
    Likes Received:
    23
    Trophy Points:
    87
    Tablet / Device:
    zt280 c91 upgrade
    Have you tried flashing the latest Zenithink update? There's definitely a file in it for the capacitive screen.

    If you do thobi recommend replacing their kernel file with this - http://www.mediafire.com/download.php?7tjox9ce32v3ztu before flashing as loads of people seem to be having problems with the Zenithink one
     
  11. Flauzer

    Flauzer Member

    Joined:
    Jul 21, 2012
    Messages:
    3
    Likes Received:
    0
    Trophy Points:
    60
    Location:
    c:\windows\system32
    Tablet / Device:
    ZT ICS C91 Upgrade | M3C91-8Gb-1a-H3 Android 4.0.3 | Kernel 2.6.34
    YES, there's nothing to do ... I'll send it for warranty replacement.

    I suspect that the heat of the components is part of this fault ...:confused:
     
    Last edited by a moderator: Jul 29, 2014
  12. ascari82

    ascari82 Member

    Joined:
    Jul 29, 2012
    Messages:
    7
    Likes Received:
    0
    Trophy Points:
    60
    Location:
    Benevento, Italy
    Tablet / Device:
    Zenithink C91 Upgrade
    Hi,
    I have the same problem.
    I tried to install latest firmware but nothing. Indeed, I was not able to find a reset button on my C91 Upgrade..
    Anyway, did you finally send it back to China? Do you know how long will it take? Thanks!
     
  13. ascari82

    ascari82 Member

    Joined:
    Jul 29, 2012
    Messages:
    7
    Likes Received:
    0
    Trophy Points:
    60
    Location:
    Benevento, Italy
    Tablet / Device:
    Zenithink C91 Upgrade
    How do you reset the tablet?
     
  14. windeguy

    windeguy Member

    Joined:
    Mar 16, 2012
    Messages:
    6
    Likes Received:
    0
    Trophy Points:
    60
    Location:
    On a tropical island
    Tablet / Device:
    ZT-280 C91 3a version
    It appears many people have developed this problem. The touch screen on my Zenithink ZT-280 C91 3a version makes random selections of icons several times a second. Either the software and/or the hardware that manages the capacitive touch screen is causing the problem. This started with an occasional jitter. With an update to the latest version of Android ICS which I had hoped would stop the problem, the tablet has become unusable. I have had the unit since March and this is a problem that happened over the past two weeks.
    I am a former embedded microprocessor development engineer, so I am quite used to debugging hardware and working alongside software developers.

    This erratic behavior happens with the charger or without the charger plugged in. I see some people have problems with the charger and when the change the charger the problem goes away. (That is a power supply noise problem and is not the exact issue I am seeing).

    I used the firmware from

    http://www.zenithink.com/Eproducts_C91.php?download

    I have flashed the latest version of ICS (314 I believe ) from Zenithink.com, then flashed the patch that is actually supposed to help jitter specifically happening on the 3a version of the ZT-280 C91 and even flashed an earlier non ICS version I tried an older version of Android. The Version 2.3, 0217 version. There is so much jitter on the screen in all cases that the tablet is unusable. I opened the unit and reseated the cables without improvement. Even when I plug in a USB keyboard, I have random selections made on the screen.

    Is there a way in addition to changing the version of operating system where I can perform a master reset and start all over? If so, what is the procedure? I suspect it is a hardware problem. Anything else I can try? As one poster asked, How do you reset and start over? I have not spotted instructions on that.
     
    Last edited: Aug 8, 2012
  15. manohar2626

    manohar2626 Member

    Joined:
    Jul 17, 2012
    Messages:
    3
    Likes Received:
    0
    Trophy Points:
    60
    Location:
    Mumbai
    Tablet / Device:
    Zenithink ZT 2A C91

    I loaded 4.0 version and again loaded the 2.3 version the problem is same, I am not sure how to reflash tablet using diffent rom....can you tell me how to do it, do you think it might be a hardware issue with the touch screen, may be the cable inside has some issue....I am not sure
     

Share This Page

Search tags for this page
chinesse tablet m3c91-1a
,
how to fix malfunctioning zenithink zt280 tablet
,
how to fix touchscreen bug on ics
,
how to set touch screen on my ztpad
,
m3c91-1a hard reset
,

touch screen not working on my zenithink c91

,
touch screen zenithink c92
,

zenithink c91 firmware para tactil

,
zenithink c91 touch screen not working
,

zenithink c97 screen not working

,
zenithink screen touch not working
,
zenithink software
,

zenithink touchscreen not working

,
zenithink zt-180 touchscreen not working aftervflashing
,
zenithink zt-180 touchscreen problem
,
zenithink zt280 tablet hard reset
,
zt ics touch screen not working
,
zt280 c91 touch screen malfunctioning fix
,

ztpad hard reset

,
ztpad m3c91-1a kod reset