I have the sportline sync gps watch. It's stuck on an error message "1C68 Pairing DOOR." How do I reset it?

SOURCE: Sportline watch setting time???

With the watch in time mode, press and hold the mode button for 4 to 5 seconds until it beeps and the digits start to blink. Then press the mode button again to advance through each setting. When finished press and hold the mode button to exit the setting mode.

SOURCE: Sportline pulse rate watch

Have you tried looking up the instructions on line? Sometimes you have to hold down the buttons for a few seconds (up to 5). Do you see any wording around the edging like "mode" , "adjust" sometimes they are hard to see. Try this and if you still have problems PLEASE let me know I will research this further for you.