So far SVS tech support has been a little slow, only communicating by email which slows the turnaround time. The only phone number I've found is for sales, which while very helpful hasn't solved the problem. However, tech support has informed me that if the LED comes on the fuse is fine so that is not the issue.
Regarding your (abboudc's) kind suggestions:
1) The receiver has all speakers set to 0dB, which should keep them all level.
2) I'm not sure what the YPAO would do that hasn't been done already, the fronts are already set to small and speaker and distance is set to 8 feet, which is pretty accurate.
3) The cable is fine as I have used it to connect one of the outs on my dvd player to the receiver, which played fine.
4) I believe the LFE out is working fine as when the sub amp is on the auto on setting without the receiver on it is red, but switches to green when I turn the receiver on, (allegedly) indicating a signal.
5) All signs I've seen so far pointing to a problem with the sub, which may mean a long delay while waiting for return shipping...
P.S. - Nice Receiver!