Now, I can see my router using DLNA
from TV and also from PC (Windows media player)
But, no any content (no video, foto etc)
the same thing from TV and from PC
Also - it is strange,
if HDD not connected to router - PC and TV can see DIR-826L using DLNA.
But, if you connect HDD to router, TV and PC will "lost connection"
And, if you will disable and after that enable Media server in the router web interfaice
you will see DIR-826L using DLNA, but still no any content