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The PCB swap worked! I used a donor board from a 3040A on the 3045 and it imaged on power up. There were some unreadable sectors; I repeated the image a second time and got a slightly different read, so it should be possible to patch a few if needed. Thanks so much everyone.

@SuperSVGA Thanks, appreciate that info! I'll give it another try but all I got was a loop that nothing was found: @NJRoadfan AWESOME! good to know that works! I just got a CP3040A eBay drive as plan B

OK, I put the PC-3000 guide through Google Translate and cleaned up some formatting so it was a little more readable. From what I can tell they have a guide to the CP3000 drive series based on firmware dumps, but it seems like it would mostly apply to the CP3045. Decoding the HDD status from...

Sorry for the long comment here but since I've ready so much great info from a lot of people so far, sharing the little bit I've learned: I decided to try following SuperSVGA's serial terminal approach to see if the board was still alive at all. First I cross-checked this with this post on...

Thanks @dramirez , I appreciate the continued responses. I don't have a vintage mac with a SCSI port anymore, but I'll consider picking one up on eBay if I don't have luck trying to tease any drive/bus debug info out any other way.

So my first attempt didn't work: Using what I read here and on other posts and youtube, I did the following: Prep ----- 1. Extracted the Apple 40SC/Conner CP-3045 from the Mac Portable 2. Removed the logic board from the drive and removed the foam debris that was turning to powder. Quick wipe...

Awesome, thanks @dramirez and @SuperSVGA ! I'll get some stuff ordered and give it a try!

Thanks for that response @SuperSVGA ! Would you mind walking me through that setup a bit more? I can grab a Zulu and I see some discussions here about building a cable, but would love as much detail as you can share!

Anyone have ideas on how to try a data recovery from a Macintosh Portable? My friend has a vintage unrestored Macintosh Portable M5120 with the internal Conner hard drive (Apple 40SC). He says when he last powered it on years ago, it just showed a blank screen. We don't necessarily want to...