[angelmb]

There is a friend that has an iBook G3 with the logic board dead, and the iBook serial number falls into those included to be repaired by Apple's Expanded iBook Logic Board Repair Extension Program,

UV117XXXXXX to UV342XXXXXX

but how funny the tech service says the iBook has the mother board died, not the logic board so that iBook G3 doesn't apply to be repaired under the Expanded iBook Logic Board Repair Extension Program … huh?, what I am missing?, logic board and mother board are the same thing, aren't ???

Are those guys trying to fool this friend of mine?

[seanc]

Logic Board, Mother Board, Main Board - they're all the same to me.

[angelmb]

Well, I have downloaded the Apple Developer Note of that particular iBook and there is not mention to a mother board, just logic board…

http://developer.apple.com/documenta...ov02/iBook.pdf

[chefpastry]

Yes, logic board and motherboard are the same. Apple just likes to use the term logic board. The person whom your friend spoke with is an idiot.

[capuchin]

The use of both motherboard and logic board is pretty intermingled - even by Apple - but there is a theoretical difference. A motherboard typically has the processor as a separate physical component - typically a processor daughterboard or processor card. A logic board has a processor physically wired to it.

That said, it's really all semantics in this day and age.

[Zak]

To further complicate the issue, some manufacturers call it a system board, which is probably the most descriptive term of the lot: in the case of most laptops, the whole system is on a single board.

Logic/mother/system/main board = that thin, usually green, expensive thing inside your computer that has so many things on it that can go bad, requiring replacement of the whole board.

[tooki]

Originally Posted by capuchin

The use of both motherboard and logic board is pretty intermingled - even by Apple - but there is a theoretical difference. A motherboard typically has the processor as a separate physical component - typically a processor daughterboard or processor card. A logic board has a processor physically wired to it.

That said, it's really all semantics in this day and age.

Err... nice try, but no dice.

The history of Apple's use of the term "logic board" is from the days of the original Macintosh in 1984: it had only two circuit boards in it. One was the "analog board" containing the power supply and video circuitry. The other was the "logic board" containing the digital logic circuitry. ("Logic" here is basically the same as computing.)

Whether the CPU is on a daughtercard or not is immaterial.

tooki

[angelmb]

So there is no mother board on that iBook? just a logic board, right?… that is, just 'one' board whatever name they call it…

[chefpastry]

Originally Posted by angelmb

So there is no mother board on that iBook? just a logic board, right?… that is, just 'one' board whatever name they call it…

Yes.