Uploaded March 2026 | Updated September 2026, 1 week ago
Monday, I recapped the first LC 475 logic board I found, as there are two in my basement that need recapped. It's not the one I originally wanted to work on, as the other is in better cosmetic condition. But it is an LC 475 still in need of our help.
After all, this board chimes and then immediately death chimes, so there is a problem. The LC 475 does have diagnostic mode in ROM, so let's see if we can use it to determine the problem - maybe we can swap chips from a donor to get it working!
Will I manage to assemble a serial cable? Will we get actionable failures out of the diagnostics? Will the board boot to the Finder by the end of the stream? You'll have to watch to find out!
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#MARCHintosh Event Logo concept and design by Javier Rivera | YouTube: youtube.com/@ARCJavMaster | Twitter: @javmast3r
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... or simply do the YouTube things: Like/Dislike, Comment, Subscribe, Enable Notifications, and participate in the Chat. These things help the channel, too!
**
Read Computerized Start™, my Official Blog: jdmcs.net/myblog
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Follow me on Twitter: jdmcs.net/mytwitter
Monday, I recapped the first LC 475 logic board I found, as there are two in my basement that need recapped. It's not the one I originally wanted to work on, as the other is in better cosmetic condition. But it is an LC 475 still in need of our help.
After all, this board chimes and then immediately death chimes, so there is a problem. The LC 475 does have diagnostic mode in ROM, so let's see if we can use it to determine the problem - maybe we can swap chips from a donor to get it working!
Will I manage to assemble a serial cable? Will we get actionable failures out of the diagnostics? Will the board boot to the Finder by the end of the stream? You'll have to watch to find out!
*
#MARCHintosh Event Logo concept and design by Javier Rivera | YouTube: youtube.com/@ARCJavMaster | Twitter: @javmast3r
*
Ways to Support the Channel:
☕️ Tips or Support via Ko-fi: ko-fi.com/jdmcs
🈷️ Support me on Patreon: patreon.com/jdmcs
📦 Amazon Wishlist: jdmcs.net/wishlist
... or simply do the YouTube things: Like/Dislike, Comment, Subscribe, Enable Notifications, and participate in the Chat. These things help the channel, too!
**
Read Computerized Start™, my Official Blog: jdmcs.net/myblog
Follow me on Instagram: jdmcs.net/myinstagram
Follow me on Twitter: jdmcs.net/mytwitter
![COMPUTER Repair: My MCA Apple ][+ Clone Needs a Power Supply & 3 Sockets! (Computerized Start™ Live)](https://i.ytimg.com/vi/Q80ly9p4EhY/mqdefault.jpg "COMPUTER Repair: My MCA Apple ][+ Clone Needs a Power Supply & 3 Sockets! (Computerized Start™ Live)
Back in September, I got COMPUTER, my Apple ][+ clone from MCA of Japan, powering up to the BASIC prompt. To do so, however, I had to disconnect the keyboard and use another Apples power supply. I think I have what I need to solve both problems.
The power supply was easy: just buy another power supply on eBay (the place where I buy the things I later regret™). I have a cap kit on-hand, thanks to the magic of buying the wrong kit for another project, so well go ahead and recap it.
The keyboard might be even easier: I should have used sockets without a lip for the three sockets that have cables installed into them: the keyboard, the joystick/paddle port, and the memory chip at E3. I purchased some sockets that should fit the cables that go into these sockets, allowing the cables to make and maintain good contact.
Will I get the power supply re-capped without drama? Will I swap the correct three sockets? Will COMPUTER still boot? Youll have to watch to find out!
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Use discount code JUSTINTIME for for 5% off all Computerized Start™ merchandise at https://shop.jdmcs.com.
*
Ways to Support the Channel:
☕️ Tips or Support via Ko-fi: https://ko-fi.com/jdmcs
🈷️ Support me on Patreon: https://www.patreon.com/jdmcs
📦 Amazon Wishlist: https://jdmcs.net/wishlist
... or simply do the YouTube things: Like/Dislike, Comment, Subscribe, Enable Notifications, and participate in the Chat. These things help the channel, too!
**
Read Computerized Start™, my Official Blog: https://jdmcs.net/myblog
Follow me on Instagram: https://jdmcs.net/myinstagram
Follow me on Twitter: https://jdmcs.net/mytwitter")
![Its COMPUTER Week: More Sockets, More Mooing for My MCA Apple ][+ Clone (Computerized Start™ Live)](https://i.ytimg.com/vi/QeiCKQ_OVgQ/mqdefault.jpg "Its COMPUTER Week: More Sockets, More Mooing for My MCA Apple ][+ Clone (Computerized Start™ Live)
This description will be updated after Tuesdays stream...
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Use discount code JUSTINTIME for for 5% off all Computerized Start™ merchandise at https://shop.jdmcs.com.
*
Ways to Support the Channel:
☕️ Tips or Support via Ko-fi: https://ko-fi.com/jdmcs
🈷️ Support me on Patreon: https://www.patreon.com/jdmcs
📦 Amazon Wishlist: https://jdmcs.net/wishlist
... or simply do the YouTube things: Like/Dislike, Comment, Subscribe, Enable Notifications, and participate in the Chat. These things help the channel, too!
**
Read Computerized Start™, my Official Blog: https://jdmcs.net/myblog
Follow me on Instagram: https://jdmcs.net/myinstagram
Follow me on Twitter: https://jdmcs.net/mytwitter")
