No signal Hi There. My Q4 doens't get any signals either along with a friend who has the same one, she said she's had no signal since tueday, i turned mine on today and had the same issue..hope those 'satalies' get repaired soon.

1999 2004 Pathfinder Q4 How to Replace Front Parking Turn Signal Bulb

In this cars, the FLASHER are unit independent for hazard and turn signal, replace it.

CHECK TO SEE IF IT HAS A TURN SIGNAL FLASHER IN IT AT ALL, TRY REPLACING IT IF IT DOES, & IF THAT DOESN'T WORK IT COULD BE THE T-SIGNAL SWITCH OR A FUSE.

Usually pulling back on the signal lever activates and deactivates the hi beams.

front turn signal wires should be routed down the right side of the backbone of the frame under the gas tank. they will be violet and brown wires along with 2 blacks for grounds.

This is taken from the Nextar Support Web Site;
"
Q: NOTICE for all US customers with M3 and Q4 series that have been having a problem recently with receiving a satellite signal.
A: Recently it has come to our attention that there has been a problem with a US GPS satellite, in the early morning of June 14 launch a sudden change in the code signal, leading to some GPS signal anomalies. It is told that the satellite signal should be running properly by June 22, 2009.

From the Nextar Support Web Site

"Q: NOTICE for all US customers with M3 and Q4 series that have been having a problem recently with receiving a satellite signal.
A: Recently it has come to our attention that there has been a problem with a US GPS satellite, in the early morning of June 14 launch a sudden change in the code signal, leading to some GPS signal anomalies. It is told that the satellite signal should be running properly by June 22, 2009."

Hi.
You are facing this problem because of the US GPS Satellite because there's a sudden change with the code signal which leads to GPS signal anomalies.
Even though you've traded it. the problem is still there.
It's better to go with another brand or model.
As this problem cannot be fixed with this unit.

I don't have a solution, but apparently Nextar has had a ton of people with the same problem. So just know that it's not just your gps unit that is doing this. I even tried exchanging it out for a new one and it even did the same thing. No signal and frozen in one spot... I went with Tomtom and it works great!

have tried turning off the auto game start