Quote Originally Posted by Neil View Post
Are you sure the problem is with the mount? Maybe the GTM35 is faulty. Do you mean the traffic symbol is 'greyed out' on the map screen or is it constantly searching for service? Sometimes the fm receiver fails in them but they do still charge. I have an old GTM25 like that and I've seen others. Try to borrow a traffic receiver, your unit's compatible with GTM 25, 26, 35 and 36 now as it was before, and now as a 3490 the HD Digital GTM60 should work too.
Quote Originally Posted by Neil View Post
All 3xxx units connected to pc via the mount with mini USB only charge and they run normally in navigation mode. That is correct behaviour. Only by connecting to pc via the unit's micro USB port will you access the PC via either Mass Storage or MTP modes [the latter being a setting in 3xxx 2012 & later devices].
Until now i haven't tried another one but I think you are right. The symbol is grey and also in the 'hidden menu' there is a string gtm25: not found or not detected

Thanks for your help :-)