MacBook Pro Whining: Which parts are being replaced

We've received some reports fingering the specific parts being replaced to alleviate a processor whine issue (which we've covered in detail) on MacBook Pros.

It now appears that current repairs are receiving new processors (necessitating logic board replacement).

One reader writes:

"I recently sent my MacBook Pro to Apple and they received today and their confirmation email said they confirm that there is a hardware problem by saying

'The repair of your MacBook pro, Repair ID (edited), is currently on hold, pending receipt of a needed part. We will notify you by email when the repair is complete."

"In initial email they put the following as cause for the whine issue. 'Problem Description: Customer sensory issues - Unusually noisy: CPU/Unit'

"One could say the cause is CPU/Unit and solution is to replace a hardware part -- seems to me that logically one would assume it's definitely a faulty CPU that causes the whine issue. This would explain the solutions of CPU usage percentage, or turning off one core solve the problem.. As also posted previously the bug was in the idle state of the CPU. When no work load is present. Perhaps this is the hardware defect being replaced. In any case, if the part needs replacing and for sure anyone experiencing this issue really needs to get it off to AppleCare.

The "CPU/Unit"  is a generic problem descriptor used by Apple service. The problems descriptor is used to categorize the issue with the machine based on the customer's description and perception of the issue. Apple Service providers have written in to tell us that the problem descriptor is not used to denote which components are failing or will be replaced.

For further coverage, see our MacBook Pro special report.

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