My Nordskog digital GPS is not functioning. The readout is fixed on 8.8.2 or something like that. Doesn't change, won't respond to to cycling switch. The receiver is of the "mouse type". I have read other threads but this readout problem is not mentioned. Is this likely to be a battery replacement situation? I need to stay digital and do not have another GPS to hook up to. Are there any local companies that could deal with a problem like this?

Thanks