Apple has launched an extended hard drive replacement program (“Repair Extension Program”) installed in MacBook laptops. The reason for this was the increasing user complaints, which refer to a flashing question mark during system boot.
This applies to all MacBook models with 1.83 / 2.0 / 2.16 GHz processors and 60/80/100/120/160 GB hard drives. However, Apple has established a tight time frame when the laptop was released. Replacement are only computers purchased in the period from May 2006 to December 2007 . The program will be maintained until August 2010 .
If the problem with hard drives arose in the MacBook, then Apple suggests contacting the nearest Apple Store stores with a request to replace the drives.