I've done everything that is posted and my unit still won't fix. I get 12 satalites that show up with differing numbers inside the boxes with the satalite number under them but I have left it for almost an hour and no lock but it does show that it is scrolling. I went to shut it off, The GPS Viewer and it actually lit up the boxes in blue but when I restarted it did not show them filled. What do I need to do to get it to fix? I have Com4 chosen and then just hit the open GPS and it scans for sats.