Re: I can't get my light to come on on my Casio model...
To turn the auto light switch on and off--
In any mode, hold down (L) (light switch at 6o'clock/bottom)for about two seconds to goggle the auto light swithch on(auto light swithch on indicator displayyed) or off (auto light swotch on indicator not displayed)
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Casio electronic watches feature many different modes ranging from timekeeping to stopwatch. The M button controls the modes. Here is how to set time on a digital watch such as models 1632 and 1813:
Press the M button to get into the Timekeeping mode.
Select the seconds digits by holding the A button down until the seconds digits flash on the display.
As the digits flash, press the C button, which will reset the seconds to 00. On some watches such as GW-500A, a stop/start button is used instead of a C button.
Press the M button and change the selection in the order of seconds, hour, minutes, year, month and day. Proceed in that sequence to change information to the current time and date.
As the sequence progress, digits flash when selected. Press the C or stop/start button, to increase a selected number or the B button to decrease it. Hold down either button to increase the speed of the selection change. All time and date functions are set this way.
Press L when any digit is selected to switch between 12-hour and 24-hour formats.
1. Press [A], the top left button, and the seconds should start flashing
2. Once you have some digits flashing, press [D], bottom middle button, and will switch between the 12h/24h formats
3. Wait a few seconds and the digits should stop flashing and return from the time set mode, to timekeeping mode.
Here is a link to a manual directly from Casio, showing you all of these steps.
As per the explanation on top of the manual, this should work with 3 different models of Casio watches, including yours.
This also drove me crazy. But I figured it out: 1. Hold the top left button down until "LIGHT" appears at the top; now you are in the setting more. you can turn the light function on or off by pressing either of the right hand buttons. 2. Then, just keep pressing the bottom left button to toggle through each of the settings (date, hour, minutes, etc.); and use the same right hand buttons to set them as needed. 3. When you're done, press the top left button again to complete your settings.
There should be four buttons: mode, reset, start and light. Find the mode button and press it three times until it is in the set time mode.
Find the reset button, which usually is located on the bottom right side of the watch face, and hold it until the time starts blinking.
Press the start button to change minutes.
Press the reset button again to switch to hours. You will know it worked when the hour starts blinking instead of the minutes.
Press the start button to change the hour. The watch can handle two modes: standard and military. As you press start, the hour will change from AM to PM, noted by an "A" or a "P" in the top right. When you get through 24 hours, the watch will change to military time and an "H" will be displayed instead of "A" or "P." Keep pressing start to go through another 24-hour cycle and it will revert back to standard time.
Press the reset button to switch to the date, starting with the month, and press start to change it.
Press reset one last time to switch from month to the day, and again press the start button to switch days.
Change the battery. This happened with mine along with the battery needing charging more frequently. In my opinion, Casio's assertions that you won't need to change the battery is pretty much of a joke. My jewler concurred.
After changing the battery I can now press the light switch button and the watch works normally.
Hey all. The charge provided by the solar cells on the watch only really extend the life of the battery. The total run time of a battery depends on how the watch is used... backlight requirements etc. The battery will be depleted and need to be replaced.
Here is a site that has good instructions on how to change the battery in your G-Shock watch.
If you want to ensure you still have a the same water resistance rating, I do suggest that you take it to a watch guy to have it replaced for you. They clean switch contacts also and you keep water resistance rating. Good Luck and vote this as a "FixYa". Cheers