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Oh I see, thanks for pointing this out. I'll be in the camp of those who appreciate the patience and dedication of the people who donate their time to make this forum possible, and who clearly feel the pain more than everyone else.

And about 68kmla vs Lisalist, I noticed no posting since February in this Lisa forum, before mine. Did the newer stuff get wiped out during the recent outages ?

Oh thanks! My programming skills are limited to FORTRAN (yes I know :eek:) and high level stuff like MATLAB. Assembly language always scared me... But you're right, there are several mentions of faulty parity chip location, so I'll look into it.

Thanks @stepleton I hope my Lizzy doesn't fail me again, but if it does, I will try the Z8 piggyback solution, although what I paid for the whole controller card was about the same price, and simpler (thanks vintagemicros.com) And yeah, I read the posts about the memory errors. Nothing...

Thanks @stepleton and @cheesestraws for your comments. Once again, I greatly benefited from your insight, and I could not have done this without your previous posts and these software tools. Looking forward to reading about these two Widgets. By the way, would you have any pointer for fixing...

I recently acquired a Lisa 2/10 from its original owner, on Craigslist (SF Bay Area). It came with an original Lisa 1 mouse (:p), and lots of software with manuals in mint condition. The cosmetic condition of the Lisa was impeccable, but it did not quite work. The screen was shaky, and you could...

For what it's worth, here is a recent post that I contributed on this issue. I do not offer an explanation, but simply an observation of different bahavior with respect to this problem with 800k FDDs

I might have found a solution that does not require removing the voice coil top magnet. I simply use a water hose washer, the flat kind that's usually orange/brown. I cut about a quarter of it, and insert it between the two magnets, in the space directly to the left of the preamp PCB. Somehow...

Thanks Ken for this comment. And I saw the video on this that you recently posted on youtube. That's great !

Very much agree. This could explain was this product was not a commercial success

I uploaded this youtube video with footages of the system in operation, FYI

After facing this problem with some of my Mac Plus-es (and also the 512k), I found this thread, as well as this earlier one. This helped me greatly. To add to it, I checked some 7-8 of my spare drives, and found two different types with respect to this red stripe/yellow stripe issue. All the...

@Kai Robinson, this MacColby is simply a Macintosh 512k refurbished into a bigger box that can be transported. So the CRT, LB, AB, floppy, mouse and keyboard are all stock Macintosh parts. Colby mostly (only ?) sold a kit that allowed people to assemble Mac components into the Colby box. In...

@JDW, as we discussed privately, I have been in touch with Karen Colby, Chuck Colby's widow. She is a great woman, and she has been very supportive of our effort to rehabilitate these rare pieces of hardware. She actually was very much hands on in the business, quite a change from her original...

Sorry it took a while. I actually banged my head hard on this one but I finally found the source of the trouble. The trimpot R55 was slightly bent, and the lead to one pole was broken. This trimpot adjusts the height of the video on the AB. This was not really visible to the naked eye, but only...

Well, the "Apple Muzeum" in Poland did not waste any time after they received the Walkmac that they bought off our eBay auction. See their blog here Good to see that Chuck Colby's legacy is expanding overseas

How many years does it take to NOT be a newbie on this forum ? I've been posting here since 2014  :mellow: Anyway, many thanks to everyone for their support. @JDW, I did feel that you were a bit forward and inquisitive and I much appreciate your apology. But to be fair, the drama that...

Thanks. The flyback crossed my mind, but I did have a pretty strong spark when I discharged the HV connecter to the CRT. Also, I do have a strong single point in the center of the screen after I disconnect J1. Anyhow, I'll start the detective work soon. It's most likely a problem in the vertical...

I now have some credible information that he passed away in September 2018

Nobody is quite sure when he passed away, but we estimate it was about 2 years ago. Actually this week-end, we held a huge estate sale and disposed of all the remaining stuff from the 400 boxes that he left behind.