The cable should be covered under the warranty. If you have a store nearby, I would take it in, and they can test with their cables to see whether it's the device or the cable. If it's the cable, they may have spares, and there ya go.
If it's the device, you may still have to call 1-800-THE-BOOK. In this case, usually, you can either have them ship a replacement and you send yours back in that box with emailed packing slips, or you can send yours in and wait for them to send you a replacement. You could ask if your store has a CPO (Certified Pre-Owned), which is standard for warranty replacement after a certain time, but they may still not have those for these models yet.
Thanks for the info. I was planning to go to my local B&N Friday evening so I'll have them help me check it all out then and determine whether it's the HD+ or the cable. I guess I'll go from there.
I know this sounds simple but was your device on? It seems really strange that Barnes & Noble had the device made that does not charge while off but I found this out the first week I had the device off and it didn't charge overnight.
I have had many issues and I am on my 2nd nook, 3rd cable. It is currently off and will not turn back on. Sometimes it will turn it self on after a day or two this time it has been off for a week. Looks like I'll be taking another trip to the B&N store.