cdotburns

What is wrong with my GPS I see many people have this same problem but no one ever list what they did to their unit to fix the problem or what may cause it? Please help me I just bought the unit I don’t want to chunk it in the river. Here are my stats GPS antenna ok Install position ok Avic n4 new (2 months old) GPS disc new (the red version) Location of antenna the roof of the car GPS signal none are showing