Ada wrote Stello, lights on the router are normal? Any IP address obtained? Can you ping it? If hard reset won't make a difference, probably it is faulty. You can claim for warranty. Lights normal...

TP-Link support ticket opened two days ago....... here is the response "Actually we haven't got the feedback that the router has the bugs: cannot login to management page and USB storage sharing...

ViperJohn wrote It's not you. The C7v2 140911 firmware has some MAJOR bugs in the UI. If you change the Web Management Port to anything higher than 49999 you can't login at all and have to do a hard...

I also just upgraded firmware and had access to UI but once I reconfigured everything and rebooted I no longer can access the UI nor the USB storage. internet traffic is being routed.