It depends on what you mean.
Most people, when asking if they can "connect" a non-B&O television to a B&O audio system, they mean that they want the sound to play through the B&O audio system's speakers. If this is what you mean, then no. There is no good way to do this because the BeoSound 5 doesn't have an AUX input which is unique in the audio system lineup.
If, however, you mean that you want to use the BeoMaster 5 interface on a non-B&O television, then yes. You can do this using an external IR receiver (the one for the Avant or BeoSystem 1 will do) in place of the ML commands. The sound, however, will be output from the BeoMaster 5 into the television so that the sound will play from the television and not the BeoSound 5.
There is scarcely anything in this world that some man cannot make a little worse and sell a little more cheaply. The person who buys on price alone is this man's lawful prey. - John Ruskin