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MDD - "No drivers for PowerMac3,6" after CPU switch

Posted by: Apfelklassik.de on 2023-02-16 05:42:15 Hello, Interesting phenomenon. After my MDD G4 1.25 DP grilled it's CPU module, I got myself a "new" CPU module. Installed, started ... Kernel message "No drivers for PowerMac3,6". Switched off. Since then the chime comes and the fans run and that's it. "No Video". Tried everything, PMU reset etc. What is striking - there are in fact (at least) 2 different "board numbers", although the 2x 1.25 was only installed in 2 MDD models. The RackMac did not have a 2x 1.25. I mean, "every" 2x 1.25 board should actually know a PowerMac3,6 ...? Or? Anyone else have any thoughts?

Posted by: Phipli on 2023-02-16 06:02:06 Might be a good question for @dosdude1

Posted by: waynestewart on 2023-02-16 09:19:19 What's the part number on the processor module?

Posted by: Apfelklassik.de on 2023-02-17 03:27:01 Fried: 820-1472A Replacement: 820-1470A

Posted by: herd on 2023-02-17 06:52:15 What cooling/heatsink setup are you using? These chips will self destruct pretty quickly without cooling.

Posted by: Apfelklassik.de on 2023-02-17 07:05:48 Yes, this ist why the 1st one was fried ... but does not explain the symptoms of #2

Posted by: waynestewart on 2023-02-17 07:46:53 I've been using a 820-1470A in a MDD for years. Just recently replaced it with a 1.33 from a xserve. If you unplug your hard drive do you still get the same results

Posted by: Apfelklassik.de on 2023-02-19 01:18:52 I tested w/o HD and CD. Tried again today ... after PMU reset, first time some 2 mins until "poweroff". Each next time 10 secounds. I assume the replacement board was DOA ...

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