The Casio G-shock GA-2100-4AER is a wristwatch designed for sports enthusiasts. With its lightweight construction, weighing only 51 grams, it offers comfort and ease of wear. The watch has a round case shape with dimensions of 45.4 mm in width, 11.8 mm in depth, and 48.5 mm in height. The watch case is made of carbon and resin, ensuring Changing the Time. Push the MODE button three times when the watch is in timekeeping mode. You will pass through the stopwatch and alarm modes of the watch and get to the timekeeping mode, but with seconds blinking. Push the MODE button to highlight hours. Push the START button to change the hour value. Mode Overview Module No. 3481 G-SHOCK - Support - CASIO Module No. 3481 Mode Overview This section provides an overview of the modes of your watch. Timekeeping Mode Training Mode Timer Mode Stopwatch Mode Training Log Mode Notification Mode Top of page CASIO official home page. This is to adjust the dial in case is out of "tune" due to strong magnetism or strong impact. In other words, is call as Home Position Adjustment Function by Casio. For battery, you may inspect whether the screen is too dim or weak. This GA-100 screen contrast may not good as G-7710, G-7800B series. cheers, Step 4. Using the pair of tweezers, unhook where the battery is held onto. You are going to need to pull the hook will a bit of force. As seen in the video. Be careful!! Do not pull it too hard with the tweezers. You don't want to damage the hook where the battery is placed. Add a comment. Past 24 Hours: 94. Past 7 Days: 619. Past 30 Days: 2,426. All Time: 490,673. Repair and support for the controllers that shipped with the PS3. Released in November 2007 (Japan only) and 2008 (other countries), the six-axis lithium DualShock 3 troubleshooting, repair, and service manuals. The Casio G-Shock GG-1000-1AER is a watch known for its durability and ruggedness. It features a shock-resistant structure that can withstand impacts and vibrations, making it suitable for various outdoor activities. The watch has a water-resistance rating of up to 200 meters, allowing it to be used underwater for swimming and diving. The watch will tell time, but the buttons won't do anythingnor will the light button. Caseback has never been off. Is there a master reset or trick to in this thread in this sub-forum in the entire site. Advanced Search Cancel Login / Join. What's New; Forum Listing Casio G-Shock To turn on auto-illumination: Hold down button (B) for 3 seconds. The wording "A. El" will appear on the dial if successful. Hold down button (B) for 3 seconds to manually disable, otherwise it will self-disable after 6 hours. Unfortunately, not all Casio watches have access to these hidden or secret features. Figured it out. The small piece of metal where the light button would be was pushed in so it would be like i was always pressing the light button. Bent it back a little and it all works. You could maybe help me out. I can't see the AC marking anywhere on the watch I've changed the battery on. Same model as you. EdlOdGB.