Me thinking of computers would suggest popping the battery for a hard reset. If that doesn't work then I would consider replacing it. Anybody else have other ideas?
But before you do I'd consider contacting Casio about it first or where you bought it from... you've had yours for just a year right? Gs normally have 2 year warranties right? You might be able to get a replacement for a defective module...
well looks like I'm replacing it bummer lol. I just got it January 11th last year and I'm 1 month past the year warranty. Tried to hard reset it which it did but it won't let me set the time, none of the buttons work
very freaking weird but I looked over and it's working again YAYYYYYYYY. Maybe it just needed some fun in the sun. Was able to set and all buttons functioning.
Sometimes these modules need a big "scare": pull out the battery for a minute and when you put it back in (as long as you are certain that it's good) do a hard reset. If the module isn't defective that usually works, like when you turn off your PC for a minute and then it starts working fine again.