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  1. It was the corrosion. White vinegar didn't work so I had to resort to the Dremel with a wire wheel. It works as it should now. The clock, time and all the settings save after shutdown. Thanks all!
  2. So it looks like the upper contact has a fair amount of corrosion. You were all correct! I tried cleaning it but it still doesn't seem enough – the date still isn't saving. What's the best way to clean them up? Tips? I'd like to make sure this isn't the issue before taking the next step. My multimeter skills don't extend too much beyond checking batteries.
  3. Yes, the battery is a type 523 4.5v. It's the one in the attached photo. I got it from Amazon: http://www.amazon.com/gp/product/B005AW9YGE/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1. I know the battery is good because I checked it with a voltmeter. I'll have to take a close look at those contacts. If that seems fine, is there anywhere else that I should Iook? Thanks for the suggestions.
  4. 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.
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