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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.

Where would you put the 3.5" bay as you can't access it from the front case of the 630? I'd say this is very much a DOS specific device right now and would not play nicely with selecting multiple Mac OS HFS partitions; maybe in future it will though with future software releases.

For me I'd use high quality CA gel (eg. the good stuff like Loctite super glue gel), and use a pin to dab into the internal crack, then wrap tape to hold it down overnight. Once together some sort of tape or mesh on the inside would help. I'm being picky and delicate here knowing that keyboard...

Different partitions with the first being OS 9 < 8GB, more for OS X and third partition for random files/MP3s etc - worked fine here.

When you boot off the Classic ROM OS (hold down command + option + X + O on startup), does it happen then? If suspect RAM, pull and clean the slots and contacts again, there are software tests like MacTest, Techtool but not neither are particularly rigorous in testing RAM.

Honestly, you've done everything that needs to be done. Is there any damage on the backside of the board - around the mains voltage section? Have you deep cleaned the board in and around larger components where cap goo can leak down (in Classic AB it was extreme - like honey).

Upload to Macintosh Garden, thanks! One of the best music/playback programs for Classic OS.

Bad RAM. There really isn’t much that can go wrong/make a Mac Plus crash apart from RAM and low voltage, while there check for any dry solder joints on the AB.