humminbird on-off switch sticking

have a humminbird 898c si , the on off button is sticking, does anyone work on these anymore?

Yes the only place that ever works on them Humminbird

Mine you have to hold down and it will count down and sometimes stop the shut down process. Powering up isn't a problem. Probably cost more to repair than unit is worth. Hopefully yours is working and you can live with it