Having purchased a power supply unnecessarily, when the problem was the PRAM battery, I do recommend that you check to see it the power supply is really dead. The voltages it supplies are 5 and 12 volts--which are standard for most computers. The differences are the wattage ratings which cover how many devices will the supply assembly be expected to power, and the configuration and mounting provisions to fit it in place.
I may be being too simplistic about this, but the 4400/SM has the CUDA circuit which controls the activation of the power supply unit. If the PRAM is corrupted, the power supply won't respond to the keyboard or panel buttons, and looks for all the world like a bad supply. If you have removed the PS and have it sitting on a desk, check the voltages on all the connectors with a voltmeter. If you don't have one, plug a hard drive to one of the device power connectors and see if it starts up. If it does, you may not need a replacement supply. I'm not near any of my machines at the moment, so I can't double check my advice for you. Do read the many FAQs available about CUDA, PRAM, batteries and power supplies. The SM has 4 motherboard connectors besides the device power connectors and I don't know what they're all for and if that's what's meant by proprietary, but I'll bet a lot of power supplies sold are recalculating as ones bought and then discovered not to be necessary. If someone knows of schematics that tell us of the voltages at the MoBo connections, I'd appreciate them posting an URL. Wulkowicz ------------ Patrick Pietrasz wrote: > > nope, Max's don't use standard ATX power supplies...it's a special / > proprietary powersupply, the same that apple used in the PM 4400... it's > possible to find a replacements, it might just take you a while to find > one... > > Patp -- StarMax is sponsored by <http://lowendmac.com/> and... / Buy books, CDs, videos, and more from Amazon.com \ / <http://www.amazon.com/exec/obidos/redirect-home/lowendmac> \ Support Low End Mac <http://lowendmac.com/lists/support.html> StarMax list info: <http://lowendmac.com/lists/starmax.html> Send list messages to: <mailto:[EMAIL PROTECTED]> To unsubscribe, email: <mailto:[EMAIL PROTECTED]> For digest mode, email: <mailto:[EMAIL PROTECTED]> Subscription questions: <mailto:[EMAIL PROTECTED]> Archive: <http://www.mail-archive.com/starmax%40mail.maclaunch.com/> Using a Macintosh? Get free email and more at Applelinks! <http://www.applelinks.com>
