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Appreciate the post. Yeah, unfortunately I got into computers with a Mac SE, so the Apple II is pretty foreign to me and the Apple III is even more of an odd beast. So I'm hoping to try to get it to boot something useful that might be able to confirm that it actually is booting. I have PCBs...

I went through the task of removing, cleaning the legs, applying DeOxit to the sockets, and re-installing every socket chip on the board, and unfortunately the end result is the same. I'm also beginning to think the video output is scrambled, but the machine may actually be booting and the...

I just picked up an Apple III locally and it came with a ProFile 5MB Drive (unfortunately no Profile card in the machine), two Apple /// Monitors, and the external floppy drive. I need to replace the RIFA caps as the big ones are cracked significantly. However, I decided to start it up in...

OK, I may solder that wire to ground then, unless anyone chimes in with a reason not to. Thanks for modeling this!

FYI, I printed a batch of these at JLCPCB in their black resin (I only have an FDM printer and I tried to print and it was not up to the task). Their black resin is a nice dark gray color - slightly darker than the 5xx series. They turned out great. I ended up switching from a cutting disk to...

Did you connect and reconnect the keyboard? Certain it is all the way seated in the connector? I'd also be concerned about the power cutting out when moving the screen. Sounds like a loose connection that may have come complete out during reassembly.

Any pictures of the finished product? I love this idea!

This makes me want to run it on my Black G3 All-In-One that I upgraded with a Yikes CPU. I'm assuming that won't work until they get it working with the Beige G3 (same logic board as the AIO). Would be fun to see NT running on a G4 AIO...

Ok, made some progress. I tried every combination of memory chips (including a new set of 8 I just ordered. Still got varying degrees of garbage on the screen. I was pushing on the memory chips and the behavior changed. Given I’ve put DeOxit on the sockets and seated and re-seated the memory...

Wow, I am not smart. It indeed was put in backwards. It does seem that that was causing a lot of my inconsistency. I think the previous issues may have been due to memory, since the card wouldn't install backwards inside the case. I'm pretty certain I fried something in the controller card...

Yeah, My IIe platinum is so different I don't have much to go off of. I'm getting pretty inconsistent boot behavior. I'll run with the same memory and sometimes I'll get the screen full of apple characters. Sometimes I'll get a white screen. Sometimes I'll get a screen with mostly @ symbols...

I should also consider the possibility that the person who owned this before me did some messing around and possibly tried to do some modifications that left it in this non-working state. I got it from an elderly woman who said it was used by her husband many years ago.

Looks like I have a Rev7 board that has a different orientation, like this one: https://www.reactivemicro.com/product/apple-ii-plus-rev-7-rfi-motherboard/ and here: http://appleclub.pl/wp-content/uploads/2018/04/IMG_0619-1.jpg Or the CPU in your image is actually installed backwards. Just to...

Yeah. I've tried several combinations of multiple rows, only the first row, old RAM, new RAM, etc. Unfortunately I just get varying degrees of either white screen with garbage, all Apple Logos, apple logos with some garbled characters. Another odd thing is I've had times where the RAM chips in...

Yeah, the CPU matches the silk screen on the board and the one that was in there when I got it.

Looks like it’s an official Apple board, or at least trying to look like one. I’ll try swapping all the RAM chips out for new ones and see if that helps. One thing I did notice when I left it running a bit is that the middle chip labeled 8T97 gets very hot when running. It appears this...

Wouldn’t corrupt RAM result in at least some of the Apple characters being drawn wrong? If I’m understanding, the video ROM is likely OK because it’s drawing the Apple characters from it. This characters are loaded into RAM to be drawn, which means at least some of the RAM is ok. But the...

Interesting. I’ve never seen any other reports of this failure mode, so I was hoping it pointed to something. If there were still bad memory, I suspect I would see some corruption in the characters (I’ll try putting some of the questionable memory in to see how the machine responds). Anyway...

Looking for some guidance as someone who was a Mac user as a kid, but not Apple II. I picked up an Apple II a few years back, and didn’t realize until after I bought it that it was actually a clone. When I first got it, I had issues with garbage on the video output and traced it down to what I...

Just a note I got 2 machines from him and not ended up working. Neither booted initially, but it's because they will not boot without RAM. Cleaned them when I got home and added RAM and both booted, with a good amount of crackling sounds from the analog board / flyback. I gave them both a...