More than likely the battery, batteries, have at some point leaked a bit of electrolyte. Doesn't tale much to leave a microscopic layer of crap, (strictly technical horological terminology there, don't be intimidated). Aforementioned crap will inhibit the flow on mA to the circuit, leaving the movement dead. Another problem that these movements have is a plastic post that supports a metal connector that connects two batteries, creating a 3v output. That post has a tendency to break. Then, there is always the possibility that your batteries are pau, as in make, as in dead. I'd check the batteries first, then the battery contacts. Unfortunately, Citizen no longer offers any support for these older Aqualand models. Also, try a reset. Pull the setting crown all the way out, and press the three buttons simultaneously. Aloha from #50, but #1 in your hearts.