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Hey folks, I’ve been trying to see what my options might be to get LucasArts and similar games working as smoothly as possible on my PowerPC machine and curious what advice people might have. Here’s the current setup: PowerPC 7200/90 48mb RAM (I think, need to double check) L2 cache card No...

Looks like someone has a model here: https://www.myminifactory.com/object/3d-print-power-button-for-powermac-8500-9500-221519

Traces on the side of U1 with the corrosion all check out and the vias as well…

Also I checked voltage on U7 Pin 15 and it was 0.1… is that expected? Confused a bit about the refresh circuit…

I wonder if the ROM chips are bad… Any ideas on how to check them? I have an EPROM reader so I guess I could try to see what’s there?

Also reflowed the EGRET chip and still nothing. Also checked voltage on pin 4 of U22 and it’s 4.9V…

Yup, saw that too… I reversed C22 and so far didn’t change anything.

Here are some photos of the board… I’ve been checking traces on the EGRET chip and so far things seem continuous, but I still need to trace a few more pins…

5, 12, -5 as expected from the PSU. Didn’t probe in other locations though…

Hey folks… picked up a Performa 450 at an estate sale and the board was a bit grungy with leaky caps, but otherwise in decent cosmetic condition. PSU voltage looks good, fan spins, HD spins up, but then no chime, and then the HD idles. Recapped the board as well, checked traces around the caps...