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Can I make an iBook burn the logicboard?
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Junior Member
Join Date: Jun 2003
Location: Denmark
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Hello,
i have an old iBook G3 and a seperat logicboard. I want to use the ibook in a school project with the logicboard. Do you think there is anyway I can make the iBook destroy the logicboard? I know that mose iBook G3s will fry the logicboard eventually, but I dont have time for that...
What can I do?
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Moderator  Join Date: Apr 2005
Location: Cambridge, UK
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I doubt it. Why would you want to?
The iBooks don't fry their logic boards, they just get too hot and the solder on the graphics chip melts slightly allowing the graphics chip to move away from the logic board.
If you were to heat the solder up, you could move the graphics chip back and everything would be fine.
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Grizzled Veteran
Join Date: Apr 2002
Location: case.edu
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Propane torch. 'Nuf said.
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pb 1440x960 | 1.67, 1.5, 128, 80 | leopard
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Junior Member
Join Date: Jun 2003
Location: Denmark
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Originally Posted by seanc
I doubt it. Why would you want to?
The iBooks don't fry their logic boards, they just get too hot and the solder on the graphics chip melts slightly allowing the graphics chip to move away from the logic board.
If you were to heat the solder up, you could move the graphics chip back and everything would be fine.
So if I place the iBook a hot place (evt. on a radiator), there is a chance that the logicboard will fail?
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Moderator Join Date: Apr 2005
Location: Cambridge, UK
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I doubt it would fail by leaving it on a radiator.
Solder has to get pretty hot before it melts completely - soldering iron hot.
I've never had a logic board fail on me so I don't know the specifics but I guess it has to get quite hot before it allows the chip to move but don't take my word for it!
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Admin Emeritus  Join Date: Oct 1999
Location: Zurich, Switzerland
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Originally Posted by seanc
The iBooks don't fry their logic boards, they just get too hot and the solder on the graphics chip melts slightly allowing the graphics chip to move away from the logic board.
Err... no.
Standard 63/37 solder (63% tin, 37% lead) melts at 361˚F (183˚C). That's far, far higher than the maximum temperature a computer reaches during normal operation. (In fact, it'll shut off if it begins to overheat.)
The iBook GPU flaw is mechanical in nature, probably stemming from the chip not being glued down enough to handle the flexing it has to deal with. The solder definitely is not melting or softening.
tooki
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Moderator Join Date: Apr 2005
Location: Cambridge, UK
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Whoops! I never said I was right.
Anyway, thanks for the info, you DO learn something new every day!
I know there's some heat-shrink stuff you can put over chips - not exactly sure what for...
Could you put that over the graphics chip to 'glue' it on?
(Last edited by seanc; Oct 5, 2005 at 09:34 AM.
(Reason:Question))
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