AirPort Time Capsule 3TB will not reset
After enjoying my AirPort Time Capsule 3TB (attached to my router and used as a WIFI base station and backup to my IMac) with no problems for 6 mos I began getting a blinking amber light. After determining from looking at the AirPort Utility that a firmware update was pending I donwnloaded that but still got the amber light. I fiddled for hours with the AirPort Utility settings the Time Capsule icon disappeared entirely from the AirPort Utility setup window. I remember I had tried a setting that said something like "use TC as extension of wifi?? After that it was gone from sight. I then tried a hard reset a couple of times but now I repeatedly get the get the message "unexpected error occured please try again". It seems the Apple Support instructions for a hard reset and a factory reset are identical - http://support.apple.com/kb/HT3728.
Any help would be appreciated
iMac, OS X Mountain Lion (10.8.1)