My Navman GPS with external antenna recently broke where it will no longer pick up the satellite signals. At first, I thought it was just the SMA type connector that needs replacing. Well, it appears it was not the only problem. I have done all the trouble-shooting I know how and before I send it off to have it repaired by the authorized dealer, I would like to convince myself that it is the reciever unit and not the antenna. Does anyone have this unit or have any suggestions?

thanks,
my3sons