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Looping start up chime

My mac pro 1.1 randomly shut down and on investigation I found that the CPUB led light was lit red. Searching through the forums I found some directions to remove the CMOS battery.


After doing this, everything boots up fine without the battery in, so I decided to get a new battery and now the OS just gets stuck in a booting up loop with the chime continuously going off.


Any ideas?

Mac Pro

Posted on Oct 5, 2020 9:23 AM

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Question marked as Top-ranking reply

Posted on Oct 5, 2020 11:07 AM

Once you install a new battery, the Parameter RAM/Non-Volatile RAM can remember across a power outage.

But what it contains at this moment may be garbage.


Use this article to reset the PRAM/NVRAM:


Reset NVRAM or PRAM on your Mac - Apple Support


.

1 reply

Looping start up chime

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