Hey guys, so i have a 6100nex. Recently the navigation shows up “ gps antenna problem detected, please contact dealer or service center” has anyone experienced this? How can i solve it. Maybe hard reset, how can that be done? Thanks in advance 

Where is you antenna located? If it's inside the dash, sometimes it can shift around and if metal interferes you can get that error. Or if the cable got pinched. Hard reset as in putting a paper clip through the reset hole? On yours, it's on the top left, next to the eject button. 

I placed it right on top of the headunit. Should i change it? 

Should be fine as long as you used the provided metal sheet under it. Mine sits outside of the dash in the center, against the windshield and doesn't look bad imo

Have you tried the reset?

i have, same thing. My sits on the dash without the pad, maybe that’s why. Imma switch it to see if it works

Update so  it was fixed momentarily yesterday after i changed the location. Today, the problem can’t back, should i change the antenna?