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Post of the week :) In my workplace when you see icons such as these you know it's some AI generated corporate speak that means very little :D

No, I didn't get the same code but a similar Sad Mac code referencing the likely position of the faulty DRAM module. I sourced good 4164 chips from here very recently: https://jcm-1.com/product/4164-compatible-ram/ You may need to send the board somewhere and as mentioned, recommend you...

Look at the letters and numbers silkscreened on the motherboard - and double check the Sad Mac codes. These diagnostic codes are pretty amazing really, for the time. As mentioned, there will be more faulty chips when you replace this one, or to come.

It points to a faulty chip in one of the banks (F9) going by the error code. You can "piggyback" a known good 4164 over the suspect faulty chip to test as troubleshooting measure. However there are likely more chips at fault or more to come very soon. Voltage instability - unlikely More info...

Hi, No translation needed - you likely have failed 4164 RAM, more than one chip, I would recommend desoldering all, replace with DIP16 sockets and new tested 4164 chips. Having just done this, it is not a fun job at all to do, you will need time and good soldering skills to get there. JB

All CC upgrades are a hack, personally I’d go with the tried and true 5400/5500/6400/6500 upgrade noting once you go anything faster than that you will hit power and thermal issues.

I’m guessing the ease of use of removing that large gear will be the sticking point, will see.

It's super fine pitch, for those reading this later it's the large black gear down near the front LED end of the board that turns into chalk. Before moving things around, tearing it down you'd do best to lubricate the rails and don't force anything if completely stuck. Check this gear closely...

Hi, I've got 2 x Apple OneScanners I'd love to see one working - one grinds its gears but has a working green CCFL tube, while the other makes the right sounds with a dead tube. Switch the tubes however and both are working :D Is there some sort of ballast hidden inside the unit to get to...

It was a great Mac on release with all those features and price. The add-on TV tuners, AV cards can also be picked up fairly cheap if not present and make for a fun vintage Mac, DOS cards were also cheap but now highly sought after

Nice, I'd go Mac OS X 10.4 on it (good bridge OS between old and new) or 10.3.9 for more speed

Hi Steve, Both are quite different machines while very similar in specs, on release the LC475 was the answer to a "cheap Quadra" while the LC630 was released more at the end of the 68K cycle as a "cheap multimedia Mac" with such features (optical drive, TV/AV cards, IR remote support), but...

Rare to die, where did you get the CPU from - known working/tested or from an overseas chip supply company?

@bakkus apologies, I hadn't read that - the documentation for the device appeared all very DOS and x86/PC centric.

The optical drives in iMac are highly prone to failure, and pain picky about certain drive media - are you using writable CDs? Try new media; is the HD known good.

.... but it's probably not going to work if at all nicely on a Mac.

Have a look at the board around the CPU under magnification, I think you might have scratched the PCB somewhere, or (eep) damaged the CPU from force of putting the halves back together. We've all done it, stuff happens ... and I bet you won't be doing it again :D

Is the bent back heatsink making good contact with the CPU, using fresh thin layer of thermal paste? Was the RAM upgraded during the cleaning process - and does it still go into the slot with a clunk on the broken end - any other signs of damage around there of the RAM pins themselves?

Not an EE and don't get the recent projects here of let's throw AI at it and put it on Github, but why not a variant of the PiStorm in a Mac? We are cheap and nobody is going to fork out $1000+ for this thing that the Amiga enthusiast might consider.