TGXL103GRN Check inside watch where the battery holding area has a metal tab to secure it. There's always a big gap btwn the tab/batt area and where it makes keyboard contact. To fix:
1 remove screws and watch back.
2 put tiny screws in dish
3 notice battery condition/position.
4 change batt if necessary
5 fold a tiny piece of paper to fill gap
6 use tweezer to put in place (no foil, no glue)
7 to test if gap is gone, close watch
8 must screw shut + reset to test
9 be patient, adjust as needed
10 take care to not strip screws.