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I am trying to locate a schematic for a G4 Titanium 1.67 ghz 15"

I need voltage reading for a 1.67 ghz g4 motherboard

PowerBook, Mac OS X (10.4)

Posted on Jun 2, 2012 5:56 PM

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6 replies

Jun 7, 2012 4:46 AM in response to gforce1140

Apple has never published schematics for any of its proprietary boards. They are not considered to be serviceable because it is not cost-effective for a professional technician to diagnose and repair problems with the components on them, and it would be all but impossible to achieve enough consistency in such component-level repairs for them to be warrantable. This is not to say that someone with the right training, the right tools and the right information available couldn't successfully make such a repair from time to time, but it isn't worth Apple's while to train and equip all its technicians for that kind of work. For Apple, it's cheaper just to replace the board with a new one. For an individual end user with a lot of technical expertise and equipment and no remaining warranty, that may not be true, but then there is still the problem of no available schematics to refer to, and that's a high hurdle.

Jun 7, 2012 7:11 PM in response to gforce1140

It's very likely that you CAN repair your Powerbook -- not by repairing the logic board, but by replacing it with a working used one. The only question is how worthwhile it would be to do so. The Powerbook is old and obsolescent, if not obsolete, by current standards. But if you don't need to use it for multimedia, video, or browsing the latest super-whizbang web sites, it may not be obsolete for your purposes, and certainly an investment of a couple of hundred dollars for a used logic board would be preferable to paying $1000 or more for a new computer with capabilities vastly exceeding your needs.

Jun 7, 2012 7:31 PM in response to gforce1140

Component level repair on almost every electronic product built since the 90s has become a lost art, for many reasons. Most components are surface mount, they have proprietary part numbers that make sense only to their manufacturer, and the boards have multiple layers. They are assembled and tested by machine, and if it fails it's thrown out since any human attempts to repair it are more likely to destroy it. Even the connectors between one board and another are extremely tiny and delicate.


These days almost all electronic products and especially computers are repaired and usually even diagnosed at the board level. Something doesn't work, replace it. Still doesn't work, replace something else. We are living in a disposable age.


If you could even get schematics, they would be nearly useless, even though you may have a thorough knowledge of digital electronic systems.


If you want to fix your PowerBook, iFixit is a good resource for both repair procedures and parts. It is about as in-depth as any you are likely to find.

I am trying to locate a schematic for a G4 Titanium 1.67 ghz 15"

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