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Apple Notebooks Apple's notebook computers including MacBook Pro, MacBook, MacBook Air, PowerBook, and iBook.

MacBook Pro runs very slow when unplugged


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PNewt

 
Member Since: Feb 23, 2012
Posts: 20
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just wanna say sorry for bein a d-bag. thanks for the help and advise. frustration had set in.
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cameloper

 
Member Since: Aug 23, 2012
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I had this problem with an early 2011 macbook pro. The problem started occuring after about one year of ownership. The problem did not happen in safe mode, but it did occur with the main user account and a newly created login.

The easiest way to check for the problem was to turn on the activity monitor. Plugged in, 99% of the CPU was available. As soon as I unplugged the CPU availability dropped to <10%.

Apple tech thought that the problem was software related, but I ran the Apple Hardware Test (the quick and extended version) and it threw a sensor failure code:

4SNS/1/40000001:VP0R-0.000

At the apple store diagnostics found the same sensor failure. They replaced the logic board. Problem is fixed.
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