Well danymarc, I upgrade the firmware, it doesnt solve the problem and the device become more unstable! Not that only but it affect the other computers which connected to router not to wa850re.

Well, I determined that the problem occurs when the TP-WA850RE is idle for some time, and the following are facts: 1. Connected clients cannot pickup a Valid IP Address. 2. The web interface is not...

I do have the same problem, I have small company that help to extend the wireless range, I decide to use tp-wa850re but i face this problem, its really disappointing! Any solutions?