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Hey there. I just want to share my recent experience with flashing windows images on a V919 Air tablet.
The reason for the reinstallation was that after a system reset in windows 10, things went wrong with the touch screen. It registered touches at completely wrong places and orientation. I tried calibrating it using the buildin windows 10 utility and it did nothing.
The step I struggled with for several days was that none of the system images downloaded from the official site was able to boot on this tablet. Eventually I stumbled upon an old web page with a 32bit windows 8.1 image and it worked. The system was then upgraded to windows 10 and everything appeared fine.
If you encountered similar diffficulties in booting the images from Onda, see if the images are 64 bit. All the ones I initially downloaded are 64 bit, and they are not recognized by this tablet. Only 32 bit UEFI files can boot. Same if you want to use some windows PE images, 32bit ones are needed.
Based on the serial number, mine is probably a V5 version of V919 Air 64 GB DualOS.
V919 AIR V7 Brush tutorial _For_Android-V1.0 20150911.pdf
View File Onda Android system installation tutorial
Google Translated V919 AIR V7 Brush tutorial _For_Android-V1.0.pdf 20150911
from file : V919 AIR DualOS（64GB）_android4.4_V7_20150824.pdf
Submitter RobV Submitted 09/11/2015 Category V919 Air dual system
V919 AIR V7 Brush tutorial _For_Android-V1.0.pdf
View File V919 AIR V7 Brush tutorial _For_Android-V1.0
V919 AIR DualOS（32GB）_android4.4_V7_20150806
Onda Android system installation tutorial - Google English Translation
Submitter RobV Submitted 09/04/2015 Category V919 Air dual system
Hi all. As i cant get my oBook 20 to see its own microphone.. I want ot re-install the drivers.
I downloaded all of them from a site mentioned here for oBook 20. Tried a few buy get message should be for x64
Don't know which drivers to use off the list.
I'd remove the existing one (which windows says is already the best) but don't know where it is located.
V919AIR Black Gold Edition V7 32GB dual system Android firmware 20150923.rar
View File V919 AIR DualOS_android4.4_V7 firmware (32GB) 20150923
This firmware is only suitable V919AIR Andrews dual system _V7 32GB Black Gold Edition version of the machine
1. Amendment to the Andrew system to automatically adjust the screen brightness problem!
2. Fix the probability of the status bar at Andrews flashing!
Refresh this firmware repartition, will remove WINDOWS system!
After the dual system of the machine refresh this firmware
Please download the corresponding WINDOWS10 image refresh!
Query version number,
see the back of the fuselage of the ninth and tenth digit SN code ,
please read the Brush instructions before Brush
Submitter RobV Submitted 09/28/2015 Category V919 Air dual system