Hey, 

I have 2 P9s. One as main on ground floor in the living room and one in 1st floor in bedroom. For like 2 years, everything worked without slightest problem. Recently, the one in bedroom (which serves only to get good wifi signal upstairs) gets disconnected after few hours (not sure excatly how many hours, as I always see its offline when I turn on playstation upstairs in the evening,  and see it cant connect to wifi)

Only thing I need to do to make work again is unplug the P9 in bedroom and plug again. After few mins it works flawlesly again.

Any ideas what can cause it? I even tried to delete the one in bedroom and add it from scratch again - didnt help. The main one in the living room works without any problem.

I didnt do any changes on the network etc... I just started to happen out of nowhere.

btw I am not sure about the HW version, Ill check when I get home

thx!