The word (op en) on the top in place of the date or the day and nothing is responding

• Auto Calendar (pre-programmed until the year 2039)

that means, you need to set up correct year in order to show leap years.... and then it will show you also correct day, after you will set it up correctly..... http://support.casio.com/storage/en/manual/pdf/EN/009/qw1545.pdf

check page 2

It's a mechanical movement and takes time, to fall into place ,

go to this link to download manual
http://support.casio.com/en/manual/manuallist.php?cid=009http://support.casio.com/en/manual/manuallist.php?cid=009

follow these instructions off the manual below if you set the watch in wrong sequens it wont change at 12 oclock
http://support.casio.com/en/manual/009/qw5125.pdfhttp://support.casio.com/en/manual/009/qw5125.pdf

de button on the side of the watch got 3 stands:
- totally to the left is nothing
- totally to the right is set time/hours/days
- in the middle set date.

Return for warranty repair. They have a 5 year warranty. Your instruction book has details and address to send it in. Send a copy of your receipt also.

so here is the fix if you get op en display on your casio pathfinder or whatever model. mine happens to be a paw 1200t
1. you gotta break it open 2 pins each side band comes off.
2. pry off the side pieces. this exposes 4 screws.
3. the base then comes off be careful of the gasket.
4. once inside. notice a round circular object on the base and a small oval shiny gold copper piece.
5. For whatever reason the shiny copper piece has shifted and does not make contact with the tiny little springs there are 2 if you shift the base to make contact with the gold piece the op en goes away and watch is back to normal.
6. the fix is move this little piece back to where it belongs. i got lucky and the glue still held when i firmly moved it to its original location. super glue came to mind if it wont stay where it belongs.

7. gasket orientation and cleaning out the gasket channel is a given i used welding tip cleaners to do the intricate work. under the bands are very grungy. mine is about 5-6 years old. reassemble the way it came out.

if your battery is good and you get this op en look to your display for whatever reason this worked for me and if casio uses this as a warranty or warning of water coming in your watch it was a STUPID DUMB IDEA. those springs should be solid state and the watch is useless until it is fixed no light, no baro, no alt, no comp. notta and no buttons work. there is no reason whatsoever that this shiny copper thing shifts but it happened to me and my watch is working and my battery has had H or full power since day one.

hi nothing of the function is responding in the watch and the word (op en)n in the place of the date

Actually I can't solve this. My son bought the same watch on a Carnival Cruise and had the same problem. Upun closer inspection with a magnifying glass, it is obvious that the hands on the day and date dials are fake!! They are just attached in the center to the watch face. The other two push knobs on the watch also do nothing at all. So basically a rip off, but at least it was only $20. At least it keeps time for now. As usual, if it seems to good to be true, it almost always is. Sorry about that, but we are in the same club with you.

Use this page to download a copy of CASIO watch manuals in PDF format. To download a PDF file, enter the four-digit (or three-digit) module number marked on the back cover of your watch.

http://world.casio.com/wat/download/en/manual/


You will need a pdf reader on your pc, you will find all instructions in there.