Date: Tue, 2 Sep 2003 18:43:08 -0400 Subject: CUDA or PMU From: Nancy Haitz <[EMAIL PROTECTED]> In-Reply-To: <[EMAIL PROTECTED]> Message-Id: <[EMAIL PROTECTED]>
I have couple of questions, based on John Wilson's Dead G4 problem. (Hope John has found the answer)
Several folks mentioned pushing the CUDA or PMU as a possible cure to getting John's G4 going again. On a G3 or G4 motherboard are we talking about the same button, or is there one for each. I am familiar with the CUDA on the 9600 and other older Macs. And, know about resetting the Power Manager on Laptops. My new-to-me G3B&W/400 has two buttons next to the battery: one labeled S4 and another labeled S5.
I tried to search Apple's archives for info related to the CUDA and PMU, in an effort to improve my understand of the G3. Apple seems to have permanently removed the two related Tech Info Articles, although there are lots of references to them. (#111934 Power Macintosh G3 Blue and White Resetting the PMU on Logic Board and #111935 Power Macintosh G3 Blue and White Resetting the CUDA Chip) Since Apple has removed the Tech Articles, and the MacGurus site is still under construction, does anyone know where I can find a nice photo or drawing of the G3 motherboard with identification of the important items?
I was able to find articles related to the G4. For anyone else who is interested I found three useful Tech Info Articles on Apple's site: #95035 - Power Mac G4 Logic Board Diagram #95066 - Power Mac G4 Resetting the Logic Board #95037 - Power Mac G4 Resetting the PMU on the Logic Board #95065 - Power Mac G4 Resetting the CUDA Chip #58561 - Power Mac G3 & G4 - Power Supply Voltage Test
Thanks! Nancy
Hi, Nancy... check out this page: http://home.earthlink.net/~gamba2/manuals.html
You'll find a link to a wonderfully detail manual for the B&W. On page 198 there is a diagram of the logic board showing the position of the Cuda Button and the Power Button, both near the battery (the Cuda is closest to the battery). The PDF file is a little hefty, at about 10Mb, but contains gorgeous full-colour photos detailing a complete breakdown and take-apart of the system.
This page came in really handy for me when I recently purchased a USB scanner which would disable the USB port as soon as I plugged it in! I was horrified, thinking this evil scanner had somehow blown my USB ports!! But a simple Cuda reset, and my baby was hummin' again. Gotta luv the Mac... built like a tank. *hehehe*
Tony
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