Report "GPS will not work on my clarion NX500. After a cold night, the GPS thinks I am not moving, the satellite reception says it is stuck at 2 bars. The GPS diagnostic screen says it is tracking 0 satellites, and has a 1000 ms ping to the antenna. I have tried disconnecting the battery, resetting the unit, and making sure antenna is plugged in, nothing has helped. I suspect the antenna died. Any ideas? the high ping makes me suspicious of the antenna itself"