About 8 months ago I was fishing at San V and my battery went dead. I got a charge from another boat but I forgot I left my power on with the fish finder going as I was charging the battery. Ever since then I been experiencing my fish finder freezing up as it was not doing that before. I tried resetting it but it still freezes. Any sugggestions? I am really trying to not go and get another one as it is still useful i just have to restart it often due to freezing. Its the LMS 334c IGPS Lowrance.