My roadster (1.5) is at the service center, and the 2.0 loaner wouldn't charge at home with the original Roadster HPWC. I get the blue flashing LED which turns to solid red after flashing several times. The VDS console shows "External Charger Problem" error. Has anyone seen this issue before and any ideas on what I could do? I am hoping when I get my 1.5 back it will continue to charge with my HPWC at home. Thanks in advance.