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Casio G-Shock Analog Digital Watch GA-150A-4A GA150A - Page 10 Questions & Answers
The battery on my Casio Waveceptor watch - model
Your watch probably needs a reset after the battery change.
Take the back off the watch. Examine the movement carefully - you should find a small electrical contact point marked 'AC' (which could be quite small). To perform a reset you will need to temporarily connect 'AC' to the '+' terminal of the battery (basically, the upper side of the battery). If you have some fine point tweezers they are ideal, but a bent paper clip (not a plastic coated one) will do.
Be very careful not the make metal contact with any other part of the movement!
Place one end of the paper clip on the 'AC' contact and, for 3 seconds, place the other end on the battery '+'. As watches sometimes need to be reset twice, there's no harm in repeating the operation while you have the back off the watch.
Once successfully reset, you should have no problem with setup and the watch should behave normally.
Hope this helps.
Change date on casio watch 3191
If the answers on the Casio website were clear and usable, there would be no need for the question. How do we change the date on the casio 3191
I am trying to change
I have a similar model. The electronics sometimes needs to be reset after the battery is changes. Get a magnifying glass and look closely at the stainless frame around the battery. There is a small AC mark and a triangle which points toward a small gold contact down in an adjacent hole. This contact must be shorted momentarily to the + side of the battery to reset the display. You can bend a metal paper clip to make the connection. You may have to try several times before it resets. It should reset to 12:00 and start running.
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