Problem with compass calibration

Does any know how to solve the problem that the white dots appear to the screen? I used the external compass and chose the Roll_180. I dont know is the satellite have the relation with compass or not? but the blue light on the board is continue bright.

It seems like you removed the compass jumper next to the GPS port, you need to set it to the highest position (if you look at the board from the top with the compass cable at the bottom) or to the left position if you look at the photo attached