Friday 13 April 2012

Mac Book Problams

The MacBook is a brand of Macintosh notebook computers manufactured by Apple Inc. from 2006 to 2010. It replaced the iBook and 12-inch PowerBook series of notebooks as a part of the Apple–Intel transition. Positioned as the low end of the MacBook family, the Apple MacBook was aimed at the consumer and education markets. It was the best-selling Macintosh in history, and according to the sales-research organization NPD Group in October 2008, the mid-range model of the MacBook was the single best-selling laptop of any brand in U.S. retail stores for the preceding five months.
There have been three separate designs of the MacBook: the original model used a combination of polycarbonate and fiberglass casing that was modeled after the iBook G4. The second type, introduced in October 2008 alongside the 15-inch MacBook Pro, used a similar unibody aluminum casing to the 15-inch Pro, and was updated and rebranded as the 13-inch MacBook Pro at the 2009 Apple Worldwide Developers Conference in June 2009. A third design, introduced in October 2009, used a unibody polycarbonate shell as aluminium is now reserved for the higher-end MacBook Pro. On July 20, 2011, the MacBook was quietly discontinued for consumer purchase in favor of the new MacBook Air. Apple continued to sell the MacBook to educational institutions until February 2012.

The original MacBook, available in black or white cases, was released on May 16 2006, and used the Intel Core Duo processor and 945GM chipset, with Intel's GMA 950 integrated graphics on a 667 MHz front side bus. Later revisions of the MacBook moved to the Core 2 Duo processor and the GM965 chipset, with Intel's GMA X3100 integrated graphics on an 800 MHz system bus.[9] Sale of the black polycarbonate MacBook ceased in October 2008 after the introduction of the aluminium MacBook.

While thinner than the iBook G4 that it replaced, the MacBook is wider than the 12-inch model due to its widescreen display. In addition, the MacBook was one of the first (the first being the MacBook Pro) to adopt Apple's MagSafe power connector and it replaced the iBook's mini-VGA display port with a mini-DVI display port. The iBook's discrete graphics chip was initially replaced by an integrated Intel GMA solution, though the latest revisions of the MacBook were upgraded with the more powerful Nvidia GeForce 9400M and later the 320M.
While the MacBook Pro largely followed the industrial design standard set by the PowerBook G4, the MacBook was Apple's first notebook to use features now standard in its notebooks: the glossy display, the sunken keyboard design, and the non-mechanical magnetic latch. With the late 2007 revision, the keyboard received several changes to closely mirror the one that shipped with the iMac, by adding the same keyboard short-cut to control multimedia, and removing the embedded numeric keypad and the Apple logo from the command keys.
Also offered in a more expensive black model until the introduction of the later unibody aluminium MacBook, the polycarbonate MacBook was the only Macintosh notebook to be offered in more than one color since the iBook G3 (Clamshell).

 Ports

The ports are all on the left edge; on early models, from front to back, they are: Kensington Security Slot, audio out, audio in, two USB 2.0 ports, FireWire 400, mini-DVI, Gigabit Ethernet, MagSafe power connector.

The front edge features a short line-shaped power light and a round black infrared receiver, for Apple Remote; the right edge features only the disc slot.
 User serviceability

The polycarbonate Intel MacBook is easier for users to fix or upgrade than its predecessor. Where the iBook required substantial disassembly to access most internal components, including removal of the keyboard and RAM,[12] users need only to remove the polycarbonate MacBook's outer shell to access almost any interior component. Replacing the hard drive and memory requires merely the removal of the battery, and Apple provides do-it-yourself manuals for these tasks.

 Quality problems

Some early polycarbonate MacBook models suffered from random shutdowns; Apple released a firmware update to resolve these random shutdowns.
There were also cases reported of discolored or chipping palmrests. There were many instances of the edges of the palm rest and screen bezel splitting and thin strips peeling off. In such cases, Apple asked affected owners to contact AppleCare
There were problems with batteries on some models from 2007 not being read by the MacBook. This is caused by a logicboard fault and not a fault with the battery.

In February 2010, Apple announced a warranty extension and recall for MacBooks bought between 2006–2007 for hard drive issues. This is caused by heat and other problems.