Been using the TomTom lately instead of the OEM indash nav. But I noticed today the OEM now has no GPS lock on any of the satellites. There has been no power inturruption and I have the CDs, but I can't re-calibrate the thing. I scoured the instruction manual but had no luck.

It would be nice to have a working nav as a backup, and if it is truely frogged, I might as well get it replaced while its under warranty. Any recommendations?