<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div>I have hacked my Dallas chips to install a coin cell holder glued to the top, allowing me to replace the battery at will. There are sites online showing you how to find the internal contacts. Don't be afraid. The worst thing you can do is ruin the Dallas chip that is dead anyway. Once you've done one, they get easier. </div><div id="AppleMailSignature"><br></div><div id="AppleMailSignature">Ian<br><br>Sent from my iPhone</div><div><br>On Nov 29, 2015, at 11:37 AM, Michael Holmes <<a href="mailto:mholmes10@hotmail.com">mholmes10@hotmail.com</a>> wrote:<br><br></div><blockquote type="cite"><div>
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<p>Gurus, </p>
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<p>I'm looking for your advice.</p>
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<p>My DEC 3000 gave me a POST NVR error and after trying all the steps to fix it (reseating boards, memory, etc...) it looks like the RTC (DALLAS DS12871A) has died.</p>
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<p>Searching on line I found some places marketing a replacement for DS1287 for old PC's but not sure if any would work for DEC given it had an A at the end in the model number (different pins etc...)</p>
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<p>Given that this sounds like a common problem on early VAXen, I was wondering if of you have some recommendations on a good source to purchase a replacement RTC that will work with DEC equipment.</p>
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<p>Thanks much!</p>
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<p>Mike</p>
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