Thread
Where is the CUDA button on the Power Macintosh 8500? And how do you get to it? I got the outer case off, but I have no clue how to get the motherboard out. I did get the grid thing off the one side though, covering the motherboard which I do not know how to remove. :?:
You'll have to disconnect all the cables going to the motherboard on top, and remove the power switch, which pops out the front. Remove the screw from the centre of the motherboard (which you would have removed when you removed the plastic motherboard holder), and then slide the motherboard towards the front of the machine, and remove.
There's probably a couple of things I've forgotten, since thats for an 8100, but it should still be pretty much the same.
There's probably a couple of things I've forgotten, since thats for an 8100, but it should still be pretty much the same.
I found the CUDA button after I got the mobo out. I realized I could have hit it while the mobo was still in. [
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*looks at decent pile of plastic chips from 8500*
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] ]'>*looks at decent pile of plastic chips from 8500*
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] ]'>There would be no point in a CUDA switch that was not accessible when the Mac was ready to run, ie fully-assembled but not closed. Many CUDA switches are in obscure positions, but accessible they are, even if that means that a handlamp and a non-conducting stiff thin rod have to be used to reach them. They are often close to a daughter-card slot, not least because hardware upgrades necessitate, in best practice, that you use the CUDA switch as the last act before you close the Mac, and processor upgrades are chief amongst such upgrades. It is probably of no consolation to you that you have now learnt several things: that 8100/8500/9500 internal plastics become extremely brittle with age; their PCI (8500/9500) card retainers are perfectly bloody (often yours); the MLB is a horror to remove even for trivial tasks such as battery or RAM replacement; and the CUDA switch has to be accessible readily, if not easily.
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Not being beside you to see what you mean by 'stick out to the side' I can only surmise that you were not able to get the rear of the board and the attached ports, the top two snap-tabs and the bottom two cut-outs all simultaneously aligned, and then to slide the MLB to the rear so that it could be held securely (by the central screw). After that, the heart-in-mouth replacement of the power-on switch and LED without breaking their plastic tangs is almost an anti-climax, no?
You may not be able to replace the metal casing if the MLB projects, so best of luck in getting it right.
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You may not be able to replace the metal casing if the MLB projects, so best of luck in getting it right.
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No. Leave it for a few days and then try again.It seems that it is indeed impossible to put the 8500 back together. The back case is broken, and the clips on the inside of the main case are mostly gone, so the mobo can't fit in correctly nor can the back case go on.
Should I part it out?
Use your third and fourth arms to hold the case internals together, and reserve your primary arms for putting the metal lid on. When you screw the case together, everything will become secure. You may need to miss out the front panel reset switch which will break anyway.
i know this is an old thread, but im new here and this is already the second time ive seen talk of the 8500's CUDA button and removal of the motherboard (which is a rite pain)
On my 8500 there is a plastic hinged arm holding the daughter-board down into the socket, its lightly latched to the base of the power supply frame thing, all you have to do is unlatch it, flip it back, remove the cpu and use the backside of an inkpen to press the button
On my 8500 there is a plastic hinged arm holding the daughter-board down into the socket, its lightly latched to the base of the power supply frame thing, all you have to do is unlatch it, flip it back, remove the cpu and use the backside of an inkpen to press the button
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