Started with an Apple IIGS (lemonade stand!), and moved on to 68k macs ~9 years ago. Sad state of affairs though, since some good stuff ain't working. Can't say that I've liberated any machines, more like collected from recycle/garbage dumps.

Apple IIGS, Pb 100, Pb 170, Pb 180c (screen cable and casing busted), LC 475 w/ 040, Q 650 (dead power supply)

4 years ago my Q650 quit, and I switched over to the pc world (omg).
Well lately I've been trying to get back into the scene as
1. school's out
2. a good friend gave me an lc 475
3. i came into a bunch of scsi disks
4. i got real cheap 16mb ram sticks

Right now using the LC 475 but want to resurrect the Q650 for more ram capacity. The story goes that one day I was using the machine, then it turned off. Couldn't turn back on. After disconnecting the hd and floppy, it turned back on after a lot of false starts. plugging back in the floppy and it turned on, but would die after inserting a disk. i think the power supply got progressively 'weaker'.
Well, I've been trying to replace it with various pc power supplies, both at and atx with no luck. Can this be done?

Btw, better to run 7.5.5 or 7.6.1? and if 7.6.1, where to dl? i couldn't get the image to mount from 68k.torpedobird.com hl server...

Thanks for everything

i think you'll have to replace the psu with something from a similar model, like a centris 650 or the the quadra 650 (were the IIvx or IIvi close enough???). We, here, swear by ebay.

There could be a chance that the pram battery might be dying and causing some problems, although I don't think your problems are related, you can try to zap it. command+option+p+r when you start it up. see if that has any affect (effect?!). Depending on how much ram you have, I like running OS8 on my q650 with 44 meg of ram. Stick with 7.6.1 if OS8 isn't your cup of tea.

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Hi everyone, new to the forums, but checking out the hl server and I'm glad I stumbled across this place!

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Welcome to the MLA!!

i think you'll have to replace the psu with something from a similar model, like a centris 650 or the the quadra 650 (were the IIvx or IIvi close enough???). We, here, swear by ebay.

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Warrior maclover5
68k Macintosh Liberation Army
Number of 68ks Liberated: 6

The battery is ok too.

Is the power supply on Q650 'special' in some way? Since when I hook up the pc power supply and turn everything on, the fan in the pc power supply doesn't spin. But then disconnect it and the fan spins again..

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Is the power supply on Q650 'special' in some way? Since when I hook up the pc power supply and turn everything on, the fan in the pc power supply doesn't spin. But then disconnect it and the fan spins again..

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keeper of the website , master of the Quadra/Centris Stick of Justice™, and figure-head of the Peoples' PDS Republic
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CCC

My profession has been mostly as a career power supply design engineering technician (25 years). DO NOT PLUG A PC POWER SUPPLY INTO YOUR MAC MOBO, EVER!!

Sorry, but the connections may match >physically<, but electrically, the wires can be arranged in any fashion the designers want... if the PC supply puts +12 where the mac wants -5, poof! Dead mobo, 99.99999% of the time. After doing that, you could plug in a brand new power supply and because the PC supply fried the mobo, the brand new supply will still not make the system work.

I'm sorry I came in late on this, I bet you haven't posted because you already decided the system was toast.

I think there are 2 ram simms on the board, but I forget the size.

You could have it for like $10 plus shipping, as could anyone else who needs it. I also have a good power supply (q700) that is available.

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