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The resistors won't matter unless they are visually browned or blackened with heat. The the black IC151 board shown was said to be hot, at 112°C, but I think that is normal... IC251 probably shouldn't be hitting 100°C (unless all your measurements were °F, and in that case, it would be...

Thanks for chiming in, ZZJ! I'm embarrassed to say that you've told me that before, about the lack of Color QuickDraw in ROM. My memory is horrific! 🥺

What temperatures did you measure in those 3 spots shown in your photo?

Some people who are much more adept at SMD work than I am go so far as remove entire SMD chips to clean leaked fluid beneath them, but I've not gone that far. Dunking the board is safer for me! 😅 But yes, pouring a lot of IPA atop the board is helpful too. Not quite as effective at breaking...

The @zigzagjoe LCD Color Kit for the SE/30 is not compatible with the SE because PDS slots differ, and the computer architecture is different too. Even if a graphics card could be made for the SE, I doubt if the machine itself has the ability to effectively drive color video through its PDS...

Meaning, you submerge the entire board in 99% IPA? If so, that's what I do when I need to give the entire board a cleaning, usually to get rid of leaked capacitor fluid. I am filming a new video about recapping the LC520 motherboard, and I will dunk that one after my new capacitors are...

He sure is. David is absolutely brilliant and a very kind person too. Thanks for being an important part of this forum, David! Meaning, the "practical use case" is "file transfers." I appreciate that. When transferring via SERIAL between 2 vintage Macs with serial ports, by way of David's...

Buying a syringe of FLUX helps alot when soldering. It helps to ensure your joints are sound. Yes, it gets super messy with flux, and even though it can be left on the board, it's best to clean it off so it won't become a dust magnet, but it makes solder flow into tiny areas you never thought...

Thank you so much for your time in answering! I do want to give you more info about the following point though... I have done the 68.4V VGA Mod in the past (currently, I've switched to the 84V 13" High Resolution Mod). The 68.4V VGA mod actually gives you the choice of 640x480 (at 60Hz) or...

@Piszigri Thanks for the reminder! Here's a convenient link to your Trading Post page: https://tinkerdifferent.com/threads/macintosh-color-classic-analog-board-and-lcd-replacement-kit.4738/ Please forgive me, but I have a few more questions that will help me and anyone else interested in your...

Yeah, I searched FAR & WIDE for a good bracket that would accommodate the rather huge black plastic extenders that I have now. But because I never had a good mounting solution, I've never really used the Extenders. And the implications of that are that you may be correct. For all I know, I...

Inside, yes. I stayed up too late last night and was losing my mind, sorry. I edited my earlier post to say this instead... So the bottom holes on MacSD are indeed matching your PLATE bracket. And I couldn't use all 4 of the holes on the PLATE bracket only because MacSD would hang off the...

I had the following Expansion Slot bracket printed at JLC in the past, but it doesn't fit the SD Extender I have (but admittedly, I've not tried to remove it's black plastic case as @François suggested)... Colin's bracket looks a bit similar, like this... An Expansion Slot cover by...

Oh, so it's a "techno-geek experiment" then. I see. I was just curious because when I do geeky things like overclock a motherboard, and that geeky act has certain key benefits for me in terms of computing power, performance, better game play, and the list goes on. I was just curious if that...

David, I found your thread an interesting read! What is your practical use-case for all that speed?

Honestly, I've never left my Sony CR44 PSU powered-on in a No-Load condition for more than a few minutes to take measurements. I therefore have no personal experience to drawn on to say why your PSU would have failed, and certainly after you replaced ALL the electrolytic capacitors. Was the...

The following info from ChatGPT needs to be vetted, but it does make sense... And here are excerpts from the "KM44C16000.pdf" datasheet kindly provided by @trag that seems to confirm that chip currents are not pulled through the Address lines...

Screenshots from my LCD Color Kit Video… But the ribbon cable is short and really made for the 15-pin connector to mount in the stock metal bracket as a result.

Since this thread includes the Apple II series, I just want to mention that the Apple IIc color is an off-white called "Fog" and according to @Javmast3r , the closest color match for a PLA filament is RAL 1013.

Wow. Great job! I have the LCD color kit by ZZJ installed in my SE/30 and it has a video out connector, so your forthcoming video out connector version would be quite useful actually. I see uses for both of your versions.