Beomaster 5 is more intended to be connected on a HD TV.
The definition of the Avant will not be enough to browse web pages.
From link room it will be even worse.
I am not sure they have released the software patch as well, that allow the BM5 to be used from link rooms.
Also you would need a LINK TV compatible with the PC command. If you're using MCL, I guess your TV isn't.
p.