Out of interest, do you know how its attached to the mainboard? Ribbon or solder?
These are soldered connections (throw hole pins)
To replace You need Soldering station, Vacuum desoldering pump and basic skills :)...
Anyone spot the radio chip in the picture's above? How difficult will it be to replace it? (maybe that's the problem with my unit)
Radio chip is inside the metal box. I think the easiest way would be to replace the entire radio module.