Have you loaded Garmin Express to make sure you have the usb drivers loaded? It takes more than hardware to make the connection. I've got a Quest, Nuvi, Zumo and Nav V and the only cable issue I have is some won't charge the unit unless it is a Garmin specific cable, but NONE of them will work unless the right drivers are loaded.
Yes I have been using Garmin Express for a long time as I also use a Garmin Swim Watch and that didn't detect the unit either, and it was explained to me by Garmin that if the PC doesn't detect the unit then neither will Garmin Express.
This unit only has UK, Ireland and Europe maps hard loaded into it as there is no Micro Sd card installed in it. Garmin confirmed that they will re install the same maps onto the new unit no charge.
They even gave me the procedure for getting the unit into a diagnostic mode and I couldn't even get it to do that so something was definitely wrong with it.
The only downside is it takes 10-14 days to complete the RMA process but with the weather as it is right here I won't be getting out much in that time
Only ridden the bike once since it was delivered last Tuesday and loved every minute of the 90mins I was out on it.
First bike in 7 years, First BMW and first Adventure type bike it was awesome
Thank you everyone for the advice though much appreciated.