I am also thinking we are trapped it is due to new asus update and no genuin solution yet not even on their service centre.I don't think changing mother board is proper solution and it is too much costly.
I am facing same problem in january I had visited to service centre they said that"We have change motherboard and charge about RS 11,000".I want to know its really motherboard problem because my phone is responding to minimal adb?plzz tell me??