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This is my best guess... going to print and see how they fit. PM7600 G3 Desktop top views PM7600 G3 Desktop

There is a ton of stuff out there... http://tenfourfox.blogspot.com/2021/07/and-now-for-something-completely.html https://forums.macrumors.com/threads/comprehensive-guide-to-servicing-g5-quad-lcs.2455017/...

I did find some other threads in google of other people using alternate pumps (other part numbers), but I have not seen anyone convert a dual pump to single pump. In theory it should work as long as the pump can keep going. @HrutkayMods has several G5 videos on Youtube about converting LCS to...

I recently acquired both a PM7600 and Beige G3 desktop with very brittle plastics. Both internal Card Retainer Baffles were damaged and missing pieces. I know they don't really do much, but I would like to have the part for completeness sake. I am generating a 3D model that I will share...

Sounds interesting... let us know how it goes and I may try to duplicate. My G3 DT currently has a 450MHz G4 in it, overclocked to 533MHz.

Here is a detailed log of someone's LCS 1 (single pump) repair. I know there are at least 3 different versions of the LCS. Some single pump, some dual.

The link I provided is a DMG, as well as this one... but if you have PowerISO, it can burn a mac DMG file on Windows. It does not need to be a CD, it could be a DVD, but it needs to be a format the that internal drive can read. Not all drives can read all media types.

Look for Apple Service Diagnostics. There are different versions, some work on G5, some do not. May be more info in this thread. Otherwise try the Macintosh Repository here. I don't recall if the G5 can boot it from USB or not, I think I burned the CD.

Should be no issue at all. There are instances where if you have a single dead or faulty CPU, the computer will only work if the dead CPU is in one specific slot, so if you get no boot at all, swap them to the opposite positions. Run the Apple Hardware Test disk if you have issues.

Well, looking at it from a binary perspective, that gives you 16 options. The board ROMs are 24pin and the sockets look like they could take up to 28pin. Maybe there were other ROM chips available at the time that would fit those sockets as alternates? I would pull the chips and read/backup...

Is your USB drive illuminated (does it have an activity LED)? If not, it is hard to tell if anything is progressing or not. Some thing to note is the requirement of a USB hub. If you look at OCLP on certain macs, a USB hub is required to install/update. It could be possible that the...

Great write-up! Moderators, please sticky this thread.

Go back to post 1 and make sure you followed the instructions.

Just received my 3 spools today. Anyone know where to get a desktop 7600/G3 style "Card Retainer Baffle" 3D model? I will try to model one myself if none exists.

I think most automobile antifreeze is usually mix 1:1. Unless you purchase the specific no-mix version. I don't think the antifreeze is so much to prevent freezing of the coolant, but to raise the boiling temperature. Although, when it is working, it should never get to boiling temps anyway...

You said there are two controllers on board, have you tried both controllers with Cable select as well as Slave/Master?

Welcome! I lived on Sint Maarten for many years before Apple made the switch to Intel.

Old drives laying in a box should be fine, as long as they are not TOO old, meaning do they have jumpers for sector size and heads? I don't think anything PPC was designed to boot off of USB, regardless if it was optical. But I may be wrong.

Just ordered 3 spools!

Yes! I have a couple MacPro3,1 with raid cards and more than 8 drives in them... And I typically run multiboot with multiple OS's that the machine can run.