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If the battery is known to be good, the watch may be defective.

Casio Watches | Answered on Nov 24, 2018

where ever you want look up for a watch repair or just about any store that sells watches replaces batteries

Casio Watches | Answered on Nov 24, 2018

You may have to cut the case open, using care to prevent damaging the watch.

Casio Watches | Answered on Nov 24, 2018

To convert a single answer from symbolic to decimal, press the S--D key (just above the DEL key). To have all answers come out in decimal format, press SHIFT MODE 2 to switch to the LineIO mode.

Casio Brand... | Answered on Nov 21, 2018

Take your Casio watch to a jeweler to identify battery type.

Casio Watches | Answered on Nov 18, 2018

Maybe you should ask yourself that.

Casio Cameras | Answered on Nov 17, 2018


Casio Office... | Answered on Nov 17, 2018

press and hold adjust button until digits flash (the digit that flashing is changeable by reverse and forward) mode is to choose what you are about to change. if your done with the digital time, press adjust once. for analogue time: press mode button until it reaches the word "H.SET" press and hold the adjust button then the word H.SET replaced by the time that you had been set for the digital time. then you can now use the reverse or forward to set the analogue time. if your done press the adjust button once then the mode button once. i hope i had been helped you.

Casio Gshock G... | Answered on Nov 16, 2018

This reset trick works with other Casio Alarm Chrono digital watches, such as my old Model W-720, similar to your F91-W. After the new lithium coil cell is installed and secured with the spring clip, the watch may show random segments in the LCD display or may simply be blank. Insert a sewing needle, paper clip, or blade of a small jeweler's screwdriver into the hole on the back of the movement stamped "AC" (All Clear) to momentarily connect the gold plated contact at the bottom of the hole to the stainless steel battery clip. The battery clip in most such Casio watches is connected to the "+" terminal of the coin cell. This will reset the CMOS chip and it should start up with the watch displaying 12:00 and the date at 1-1. Then, use the control buttons to set the time and date in the normal fashion.

Casio F91W-1... | Answered on Nov 14, 2018

Press [SHIFT][DEL] (INS) to toggle between INS and Overwrite. The cursor will change from a horizontal line to a vertical one.

Casio FX9750GII... | Answered on Nov 14, 2018

In the Alarm Mode, use D to scroll through the alarm screens until the one whose time you want to set is displayed.

2. Hold down A for about two seconds until the alarm time starts to flash. This is the setting mode.
3. Press C to move the flashing between the hour and minute settings.
4. While a setting is flashing, use D (+) and B (-) to change it.
  • When setting the alarm time using the 12-hour format, take care to set the time correctly as a.m. (no indicator) or p.m. (P indicator).
5. Press A to exit the setting mode.
To test the alarm
In the Alarm Mode, hold down D to sound the alarm.
To turn an alarm and the Hourly Time Signal on and off

1. In the Alarm Mode, use D to select an alarm or the Hourly Time Signal.
  • When the alarm you want or the Hourly Time Signal is displayed, press A to toggle it between on and off
  • The alarm on indicator (when any alarm is on), snooze alarm indicator (when the snooze alarm is on), and the Hourly Time Signal on indicator (when the Hourly Time Signal is on) are shown on the display in all modes.
To stop the alarm
Press any button.

Casio Watches | Answered on Nov 13, 2018

you nearest casio dealer may have one in the back of the store,
many buyers don't want/need the manuals so some stores hold on to them for such occassions

Casio LK-100... | Answered on Nov 11, 2018

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