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WTB: iMac G3 motherboard and base
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Professional Poster
Join Date: Aug 2006
Location: Your mom's underwear drawer
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I just acquired a blueberry iMac G3, but it's missing the motherboard and the plastic bottom that holds it....so I'm looking for one, preferably with an optical drive (and bezel for the front of the tray), since this is also missing that part.
The only requirement I have is that it be at least 500MHz and have FireWire...anything older is a little too obsolete to be useful.
Not looking to pay much - like $25-$30 shipped to 47901. I can do a pickup in northern Indiana or the north side of Indianapolis, as well.
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Professional Poster
Join Date: Dec 1999
Location: Tampa, Florida
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Funny that I own a 500MHz G3 iMac motherboard. However, I don't have the plastic holders nor the optical drive. I cannot test it either because I bought separately to build a Mac, but I never got around to do it.
I will snail mail it to you for $20 if you want to take the risk.
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Forum Regular
Join Date: May 2007
Location: PA
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is it a slot-loader or tray-loader?
the 350-700 mhz imac G3s were slot loading; the mobo screws to the metal frame.
then the faraday cage goes over that, then the plastic bottom.
there's a separate metal hd/optical carrier - do you need that too?
the 233-333 mhz imac G3s were tray-loading, and had a bezel on the front of the optical drive tray.
the mobo sits in a metal 'bucket' of sorts that slides into the bottom.
Installing RAM. iMac 233-333 Mhz.
vs
Overclocking a Slot-loading iMac G3
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Professional Poster
Join Date: Aug 2006
Location: Your mom's underwear drawer
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There's a big hole where the optical drive used to be, so I'm guessing it's tray loading.
Is the motherboard the same size across the board? Like, if I got the plastics for the bottom, would a 500MHz board fit securely?
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Forum Regular
Join Date: May 2007
Location: PA
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a tray-loading imac mobo is not interchangable with a slot-loading. the fastest you can put in there is 333 MHz, and no FireWire.
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Professional Poster
Join Date: Aug 2006
Location: Your mom's underwear drawer
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Are the dimensions of the boards that different, or could I figure out a way to fit a better board in there?
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Professional Poster
Join Date: Dec 1999
Location: Tampa, Florida
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Originally Posted by shifuimam 
Are the dimensions of the boards that different, or could I figure out a way to fit a better board in there?
I don't know about absolute dimensions, but the iMac/A/B motherboard had square and 45deg angles all around. Firewire iMacs had an oval shaped motherboard.
You could buy a dremel to make it fit, and lots of wire in the very likely case you'll need to restore electrical connections you might need to destroy in the process.
It is very tight inside every iMac.
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Forum Regular
Join Date: May 2007
Location: PA
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it will not work. consult the various guides online. i worked on iMacs when i was a break/fix tech.
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Professional Poster
Join Date: Aug 2006
Location: Your mom's underwear drawer
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I was thinking more along the lines of a nanoITX or microATX board, along with replacing the CRT with an LCD.
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Forum Regular
Join Date: May 2007
Location: PA
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this turning into a bit of a non-marketplace discussion... but here goes.
imac 233-333mhz logic board:
imac 700mhz logic board:
plus they tie into power/analog video boards which not only vary from slot-load/tray-load, but within slot-load models.
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