Hi Sir. If you tab booted well with v1.1 (with the exception an inverted touch screen) then it means it is NOT compatible with V20 at all. You will then need to flash v1.1 again toget it to boot up again. Unfortunately, I cannot be of much usefulness with regard of correcting the inveted issue but I am will to run a research and share any worthy findings. Yes this did not occure when the file was tested and hence a solution was not provisioned for.