Hi everyone! This is my first post and my English is very bad I needed to replace the Touch Screen of my Chinese Unbranded 10.1" AllWinner A20 Tablet just like this (http://www.**************/snapshot/279985783.html), but the seller sent me out it with another code (the correct was IV-3C and he did IV-3D) and now my tablet doesn't work properly. Besides that the tablet seller doesn't answer me anymore. I tried to update software with iso files from several brands (irulu, mapan and others), changed axis configuration but nothing works. I think the solution is update its firmware but I didn't find nothing about it (firmware file and program to do this). Could someone help me? Thanks for attention!