Casio protrek watch altimeater and barometer only showing ----- lines temp and clock are fine I have comparable problems With me it is even stranger. My barometer works still more or less, as long as I wear the watch. When I take of the watch, most of the times the history is no longer updated (these grafics where you can also see the temperature).

You can download the manual from the link below. The timekeeping instructions are found on pages E-19 - E-24

http://support.casio.com/en/manual/009/qw5213.pdf

go here for the manual > http://www.gshock.com/support/

Scroll through the screens until you get to the alarm screen and select the barometer button to turn alarm on and off.do not go into edit mode.

it's because the contact that sense whether the watch is opened or not is misaligned.
Just open the watch caseback, re-allign the gold contact on the case-back, and make sure it touches the spring in the other side of the watch.

The word LOW means that the solar battery charger is not charging. This could be a defective charger or you're not out in the sun long enough to keep it charged.

If you haven't got instructions on how to do this, you can get
instructions from the Casio web site.

Go to the casio web site "casio.com".

Select "support" and the "manuals",
watches;

Accept terms

Select "watch manual archive"

Read the number of the back of your watch and enter it into the search box

Click on my profile (escapement), then click on Tips and Tricks. There you will find link to all CASIO watch manuals. Rate me, please .

The problems is very simple: On the back cover (inside) is a little Cu metal Part. This part is glued to back cover using a poor glue (rubbered glue) and, in time, is moving from original position. You must put back this parts to original positin ( a little hole inside of back cover) and glue using a good glue. When the back cover is mounted , this part must have a ferm contact with two springs from mechanism (sensor for back cover open). If beatwin this springs isn't a electric short (using Cu metal parts) the internal mechanism of watch "see" the back cover is open and show "OPEN" on screen!

Sounds like the solar back up cell needs to be replaced. You can get it repaired for rather cheap less that $30(US). You can contact www.casiosalesandservice.com to have it serviced. 877.659.0761

wait until the battery is full reloaded