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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.

Definitely not spam! Probably the best vintage Mac "show off" software that exists. Were you reading my mind? MacFlim was something I was just going to try on a Mac Plus just built with a Micromac Performer card and configuring software on it next :D

CRT rejuvenators = most useful as a last resort for coarse pitch CRTs as used in high hour arcade monitors, would say PC monitors would be a no go due to finer pitch and sensitivity. I've got this 14" cocktail arcade with a sharp CRT image, but it dims big time with bright images; was used in a...

It it is a CRT with thousands of hours and has slowly gotten worse - the tube is dying a slow and predictable death. It may also be evident when you display a bright white image - if the screen dims even more then doing this, that's another sign of wear. CRT rejuvenation is like rebuilding a...

My go to tester has been a 486 motherboard! It POSTS quickly and you can run Memtest on it

If you’re in between a fair bit of it, maybe a nicely done steak

The paint matches the G4 casing - a close match to repaint would be a cool off white. In Australia a common roof colour is "Surfmist" in Colorbond steel, and a close match IMO if looking for spray paint.

Got it - leg chopping time it is :D

Hi, resurrecting a very old thread, but was mine from 2016! I'm replacing a 16 x 4164 RAM chips in this very 128K board, where two chips replaced above some years ago, now more chips are failing so going to replace the lot with sockets and NOS 4164 ICs. Could I please ask for advice regarding...