MCU upgrade for MTCC-KLD6-V2.91

[Elio]

Hi..I bought almost one year ago my Pumpking Quad core Android 5.1 car stereo. It was working fine but now I have a failure of my touch function. The touch function is not longer working the middle lower screen. The middle upper screen function is working normaly. I was reading oh the web and somes recomend to upgrade de MCU to fix this problem, but there are several different MCU file on the web to upgrade and I know if I try to upgrade with the wrong file I could damage my car stereo. Do you have some MCU file that I could use? Do you have the MCU file to upgrade from the 5.1 lollipop to the newest 6.0 marshmallow version?
This is the specifications of my Android car stereo:

MCU Version: MTCC-KLD6-V2.91
May 31 2016 19:54:14

Android Version:
5.1.1
1024*600

kernel version:
3.0.101+
root@chun/book#11
Thu Jun 30 11:25:16 CST 2016

Build number:
rk3188-userdebug 22062016.16:41:09

Thanks for your help and support. I appreciate that.

[Jammy]

Hi,
please first tell me your order number in amazon or buyer id in ebay,Pumpkin or AliExpress so that we can confirm your unit model number and so on.
Regards

[Elio]

[Jammy]

Hi,
you can try to update the unit.
Here is the firmware for the unit RQ0276.
https://mega.nz/#F!cd1XEQBT!bpFEJtpzJBgi0mYQEWukNA
Hope to help your.
Regards

[Elio]

Hi, thanks for send me the file.
I was trying but this file is not working. When the system reboot show a message that say: system updating, but later appearce a image of a android dead with a message that say firmware fail, update cancelled. then the system restar and goes to the main normal android screen. Do you have another MCU file which I could try?
Thank you.

[Elio]

[Jammy]

Hi,
you can try this .
https://mega.nz/#!FEtQRahA!Oh084yfP8jPF ... JpEo-rPUJE
If you still meet same problem,please show us a video or some picture about the prompt info,thanks.
Regards

[Elio]

Hi. Thanks for the link. I finally did the MCU upgrade, but the problem with my screen continues. The lower section of my screen do nor respond of touching, only the upper section of my screen is respond to the touch. I opened my car stereo and I swapped the two wirings wich connect the screen with the main board but the problem continues. so the problem is not wiring. If I connect a external usb mouse to my unit, I can navegate normally for all the menus. My car stereo is working normal, but I have that issue with the touch screen. I tryed disconnecting and connecting the screen power wire but the problem continues. I added a photo of my screen (see attachements) where I drawed a red line. from the line to up the car stereo respond to the touch but from the line to down do not response to the touch. The power and return bottoms responds to touch buth the volume up and down bottom do not responds to touch. The reset bottom is working normal. Let me know if you have some idea of the probable cause of this fail. I am now sure if changing just the screen would fix the problem, because I dont know if the problem is the screem it self. Could I reset the touch system? Maybe the problem is some touch file.
Thank you for the assistance.

[Jammy]

Hi,
For this situation,you can contact the customer service to change an new touch screen.
Regards

[Elio]

Hi. About what you said, how can I contact customer services? any suggestion? If you have the email of customer services let me know.
thanks