Today is the first time I have attempted flying my Phantom in about a week, probably the longest it has been grounded. I powered my remote then the phantom and the Phantom flashed slowly yellow (warming up I believe that means) like normal. But it kept flashing..and flashing...and flashing for about 4 minutes until it went to solid yellow. I have not been able to find much help by searching. I do not have a gimbal or anything extra - it's a basic stock Phantom 2. I have tried recalibrating the compass, it was successful based on the green light, but afterwards it continued to flash yellow for almost 5 minutes. The controller is green and has a full battery. I tried removing the battery and cleaning off the connectors with no luck. I also made sure that GPS was turned on. I have flown in this location before without any issues. I did not try flying the phantom with it solid yellow because I don't know exactly what the color scheme means. I thought maybe it couldn't connect to the satellites or something? If it means anything, I have just come back from a road trip with the phantom. I flew it at several loacations and it started up and worked perfectly. Going back and forth I packed it in the original box exactly how it was shipped to me when I bought it, I made sure it was safe and would not bump around. I can't imagine that anything could have broken because I took such good care of it.