Hello – I have a Mac Plus that won't save any settings, such as the time, date or mouse tracking. I replaced the PRAM battery on the back of it with a new one, but it still won't maintain it's internal clock after I shut it down for the night. What could be wrong? Is there something on the logic board that could have gone bad? It's not the end of the world, but it's annoying and I'd like to find out what it is.

Thanks.