We can relate to "many" isuses with the 7710. We bought ours new in Feb 2012 via RM internet site. Probably have about 5 hours total on our unit. Quit charging totally. Sent GPS back to RM after many phone calls/emails and they said they replaced USB port. Again, it's not working. This is sooo ridiculous. Anyone have recommendation on "reliable" RV GPS? Thought about purchasing a truck GPS but might not have info for campgrounds, RV services, etc. Other than power issue, really liked the user-friendly features of this GPS. What a disappointment!!!! Especially Rand McNally's lack of support for this product.
