updated 09:40 am EST, Tue November 24, 2009
Source of flaws remains unknown
Some buyers of the 27-inch Core i7 iMac are receiving unusuable systems, threads on Apple's support forums indicate. In a collection of cases the systems are failing to even turn on properly, at best sounding the Mac startup chime, always failing to display anything more. Apple is reportedly offering replacement iMacs for affected customers, but this may involve a shipping time of two weeks, as Core i7 is an upgrade option not normally sold at retail.
Other buyers are said to be receiving iMacs with cracked screens. The damage is unusually being inflicted only on the bottom left corners of displays, and without any sign of broken packaging. It is speculated that the current production run of Core i7 systems may have a weak spot, and/or that its packaging is insufficient.