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You are right: at some point, Apple axed write support for MFS disks, but it wasn't immediately after System 6. I used ResEdit 2.1.3 on System 7.1 to make my System 6.0.3 MFS disk to boot on a Mac 512K (see that article in the Mac 512K Blog). I was directly modifying the System file on the MFS disk.

Finder 7.1 can read and write 400K MFS disks. It won't show MFS "folders" on such disks (which actually are resources in the Desktop file). Files dragged to trash from an MFS disk will be erased immediately (becaue MFS doesn't support real folders, which is how the Trash works).

Operating System does not matter so long as you are using Disk Copy. Disk Copy has its own Sony disk driver and can read and write any format that the disk drive itself can read: Apple II ProDOS, Lisa, DOS, MFS, HFS, etc. With Disk Copy, I read and write 400K MFS disk images on a Power Mac G3...

You definitely want to stick with tractor-fed paper for the ImageWriter. Sheet-fed paper will lead to a high-percentage of jams and misfeeds (like pulling 2 sheets at a time).

The Finder copies disks. On the Finder desktop, drag the source disk icon on to the destination disk icon. You can copy disks with only one drive, but two drives is faster.

He really doesn't know. I wouldn't ask Woz any Macintosh questions at all, or at least he wouldn't be toward the top of my list to ask.

That's expected behavior for a machine that does not chime and shows a checkerboard pattern. The "small bit of activity from the drive" may be the track 0 calibration. The 400K Sony drive pulls its head back to track 0 at power-on. Check your ROMs. They look homemade and suspect. Maybe they...

The 600e from the mid-90s that you want to buy is fine as long as you have the up-to-date Apple CD extension.

I think your time and money would be better spent looking elsewhere. But if I'm wrong, and it is a capacitor problem, I think it's more likely to be on the analog board than the logic board. To get some more information about the present capacitors, do this: 1.) Turn on your Mac 512K without...

I have been thinking about your situation since last week. If I understand your story correctly, your Mac had been able to boot Loderunner OK, but now when you boot this disk you get the flickering Welcome box? This is a little tricky to debug without more information, but generally in my...

I would put my money on the problem being closer to the connector than the speaker.

By "spots" do you mean "bytes" ? Off the top of my head, I can name the "Stolen from Apple Computer" icon as something that could be overwritten. Or at the tail end of the ROM are several sets of initials which could be overwritten. A little more obscure are the Toolbox traps for resource...

It may be Microsoft Chart, or it may not be anything. It could be a mockup screenshot merely to promote the Plus as a business-class machine.

I don't need to do any testing while I wait for the CRT part to arrive in the mail. I already did my testing, determined what part(s) I needed, and my Mac remains powered off while they arrive. I install the part(s), then power on the Mac again and it is fixed.

Your Sad Mac error 0F0064 means that the Mac's boot loader in ROM found the boot blocks on disk, but wasn't able to load the System file. Stick to 400K disks for now. The single-sided 400K drive can read 800k disks, but only the bottom side, meaning the Mac's ROM will find the boot blocks on...

After I posted that link, I was wondering if that's actually what you wanted.  :p And now I'm not wondering. I bought a black ribbon from one of these suppliers probably about 8 years ago. Don't remember which one, but it is still working fine.

Take your pick; plenty of suppliers for black ribbons

Dan Allen, author of the above-mentioned book, used to work at Apple back in the 1980s. Are we sure this is the same guy as mentioned in that README?

The list of Sad Mac codes says "4 = Memory test - Mod3 test"

G10, G6, F9, F8, F6, and F5.