To tweak the time zone on your G-Shock watch, all you have to do is hold down the mode button until you see the abbreviation “TPE” appear. After that, your G-Shock should be in time mode. All that is left to do is hit the forward button multiple times until you reach the correct time zone. To lock in the time zone, simply hold down the
Speed hand. You can use the stopwatch to measure elapsed time, lap times and split times. If you specify a distance value, the stopwatch also will calculate and display speeds. The digital display range of the stopwatch is 99 hours, • 59 minutes, 59.999 seconds. The stopwatch continues to run until you stop it. 8167 posts · Joined 2013. #6 · Jun 1, 2019. The watch is probably defective. I had a GW500 (the predecessor of this watch with 5 multi bands instead of 6 like the GWM500A has) and the module became faulty and the adjust button stopped working. However i cannot see anybody needing to open the watch, It is solar.