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@archer174 Ok, that’s good news.  I do have great difficulty in loosening the yellow wired cables from the Logic board. I don’t want to damage the cables and sockets. What should I do best?

I've opened the CD SC Plus (a hell of a job!). I have not managed to get the plugs out of the Logic-board, they are mighty stuck and I've read about how vulnerable they are. When I look at the back of the Logic board, I see a few very slight corrosion marks. Does anyone of you...

This is what I found in the Apple Service Source document of this device (http://tim.id.au/laptops/apple/misc/applecd_sc.sc_plus.pdf): (Troubleshooting/Symptom Charts - page 2) : "Red LED does not light when you insert the caddy 1 Exchange drive mechanism. 2 Exchange LED board. 3 Exchange...

Hi techknight and archer174, thank you for your replies and insights! I am not a technician I'm afraid (although I can mend a few things :). How do I see that the laser assembly is not ok anymore? Replacing this item will not be possible anymore, since the device is 25 year old I guess?

Hi, my AppleCD SC Plus (M3021) is unable to mount cd's or cd-roms. It is hooked up to a Macintosh IIfx with OS 7.5.3, has the proper installed software and is (I think) neatly terminated in the right manner (it is the only externally installed SCSI-device and has the terminator in the upper...

Hi! I have a Macintosh 128K (a European version, 220V) which is converted to a 512K. It looks like just te chipset has been upgraded, but is it done by Apple (see attached photo)? The chips are branded with NEC so that makes me suspicious that it is not. Is this an original Apple-factory...