Mend Casio CMD-40B Wrist Watches

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Mend Casio CMD-40B Frozen Battery Replaced

How do you fix a frozen digital watch?

I've had a casio CMD-40B watch for over 5 years now. It recently died, and I took it to get the battery replaced today, after that, it worked fine. I got home and began to use it, and it froze. I couldn't get it to unfreeze, so I simply took the battery out and put it back in. To my surprise, it's still froze! Does anyone know how to fix this problem?

Watch: Casio Wrist Remote Controller CMD-40B Module #1175

Bo Adams
March 2008

Casio Casio CMD-40B Clocks and Watches, Wrist Watches Frozen Battery Replaced

They're cheap. If you can't fix it toss it and buy another watch.

George
July 2021

That was a cool tip Mark!
Thanks!
Saved my day!
I found this page in a Service Manual too:
https://www.manualslib.com/manual/1259331/Casio-G-Shock-Qw-3403.html?page=8

Kostas
March 2021

I've had similar issues with this watch, but I think I was able to get my watch working again by holding all three side buttons down for a few seconds (set/shift, select/c and mode buttons). That seemed to unfreeze the screen.

Tom
May 2017

look for a little point in the back of the watch marked 'AC' (All Clear), and make contact between that point and the battery with any conductive item (like metal tweezers, a bent paperclip etc), and this should reset the watch.

mark
April 2010