[rishabh]

hi i have an allwinner tab similar hardware to ainol novo 7 advanced

i flashed few firmwares on it of different tabs( ployer momo 9 , ly f1) and they were working good

except novo 7 advanced firmwares ( touch was not working at all )

then i flashed a different firmware(onda v140) on it and the screen went white when powered on .
then again i flashed my default firmware everything is working now but touch screen is responding very differently . this is a capacitive touch . i have even tried flashing those firmwares which were working perfectly before but now the problem is common in all firmwares i flash .

see the video

then after that i tried flashing onda firmwares for 7 inch tablet that has auto recalibration of screen function after flash.

the touch points changed from previous one.

now my question is since this is a software/drivers issue how can i get it back

is my tablet bricked ? any chance f bringing it back to life.
rest everything is working fine including camera. and i am able to use adb on pc and run commands easily ..
please help anyone

 

[rishabh]

i always select format option.
tried doing factory reset also

 

[rishabh]

thanks sir for your reply but sorry i did not get you . do you need all information about my tablet ?

allwinner a10 cpu
512 mb ram
capacitive touch
8 gb
android 2.3.4

link for my tablet
http://www.geartaker.com/product/gpad-ga10-allwinner-a10-cortex-a8-1-2g-7-inch-capacitive-android-2-3-tablet-pc

on running command cat /proc/cpuinfo
here is the response

Processor : ARMv7 Processor rev 2 (v7l)
BogoMIPS : 1005.97
Features : swp half thumb fastmult vfp edsp neon vfpv3
CPU implementer : 0x41
CPU architecture: 7
CPU variant : 0x3
CPU part : 0xc08
CPU revision : 2

Hardware : sun4i
Revision : 0000
Serial : 0000000000000000

 

[rishabh]

no sir the touch did not work correctly with this rom

 

[rishabh]

wow , yes sir the touch points got reversed with this rom .

but now how to get the right configuration for touch ? so that it works only where i touch

thank a lot sir for your time and help

 

[rishabh]

yes sir the touchscreen does not work the way it should ,
like i press the right centre of the screen and the touch happens at the bottom left ,
middle part of the screen is not resposive and the capacitive buttons does not work at all

by the way can you tell me how you changed the screen touch points the procedure so that i can at least try to change the touch points as maximum as possible so that the device can be operated thanks

 

[rishabh]

this occurs when a firmware for ips screen tablet (eg ainol aurora) is flashed on a tablet which does not have ips screen .
Then a white screen appears on the tablet and some thin coloured lines on the tablet divides the tablet vertically into 3 parts
like
! 1 ! 2 ! 3 !
And then if we flash the stock rom again (everything works normally except touch)

The middle part no 2 ( in fig ) is totally not responsive

when we touch in part 1 area the touch happens in part 3 with mirror effect (eg when we swipe from left to right screen moves from right to left horizontally, though vertical orientation is ok) and vice versa i.e
touch in part 3 area touch happens in part 1 area with mirror effect

I HOPE SOMEDAY SOMEONE POST A SOLUTION TO THIS PROBLEM PLEASE

 

[rishabh]

thanks though i tried again but the recalibration app didnt and wont work because capacitive touch screens are calibrated from factory whearas resistive screen is manually calibrated.
What i think is that the rom for ips screen that we flashed has changed the screen hardware id from non ips to ips screen .
that is why even after flashing stock rom it is detectd as ips screen and it is behaving unusually .
Though I could be wrong also
does anybody here knows anyone who could help us out ?
Thanks

 

[rishabh]

There is a partial solution. (Post in Russian)
Principle the work is already possible

http://4pda.ru/forum/index.php?showtopic=296921&st=1320#entry12972207

thank you sir for your help .

i am unable to download the file momo9 touch fix .zip

can you please upload it for me here thank you it is only 1 mb .

thank you sir

 

[rishabh]

thank you sir for your help ,
though the problem is not completly gone it has improved a lot from previous one.

please update us in future also if there is a permanent solution

thank you