Uploaded August 2025 | Updated September 2026, 1 week ago
The Macintosh IIsi was launched as a lower-cost alternative in the Macintosh II series. To keep costs down, Apple used more electrolytic capacitors, and the surface-mount electrolytic capacitors from the early 90s are past their expected lifetime. In addition, despite the power supply being made by Sony, the capacitors in it are also known to leak (though I can't help think "cost tweaking" by Apple led Sony to use lower grade capacitors).
Due to the extent of the damage to the original power supply, I ordered PCBs to construct a replacement power supply that fits in the original power supply case. I need to finish assembling that power supply, including making a few mods to it to improve performance (in a "make sure there is a ground connection kinda way).
Once I've done that, I need to start the process of locating faults.
Will I trip the circuit breaker? Will I find the cause of the vertical lines? Did I order the correct 74ALS245 package type? You'll have to watch to find out!
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Table of Contents
0:00:00 Pre-Roll
0:02:39 Greetings and Announcements
0:05:20 Things You All Have Given Me: 3D Printed Bracket and Memories from @RetroTechChris
0:10:33 Retro Bits and Bytes Swap Meet Pick-Ups
0:16:49 Wheel of Regrets™ (Who comes up with these titles anyway?)
0:17:11 Wheel of Regrets™: My Order from @i80386sx's eBay Store (Not Actually a Regret™)
0:24:55 Wheel of Regrets™: Nintendo Game Boy DMG-01 Parts
0:45:13 Getting the Macintosh IIsi (number 2) and Other Parts
0:48:02 Yes, Apple Made a "Trident" Card (mine's bad)
0:50:17 Finishing the Power-Up-llusi, with Mods
2:16:03 Setting Up for a Power Supply Smoke Test
2:20:23 Power Supply Smoke Test Time
2:23:28 We Have a Video Signal - With Vertical Lines - from the IIsi (number 2)!
2:25:10 Let's Tackle Those Vertical Lines
4:14:02 Closing Thoughts
4:22:55 Outro
*
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
The Macintosh IIsi was launched as a lower-cost alternative in the Macintosh II series. To keep costs down, Apple used more electrolytic capacitors, and the surface-mount electrolytic capacitors from the early 90s are past their expected lifetime. In addition, despite the power supply being made by Sony, the capacitors in it are also known to leak (though I can't help think "cost tweaking" by Apple led Sony to use lower grade capacitors).
Due to the extent of the damage to the original power supply, I ordered PCBs to construct a replacement power supply that fits in the original power supply case. I need to finish assembling that power supply, including making a few mods to it to improve performance (in a "make sure there is a ground connection kinda way).
Once I've done that, I need to start the process of locating faults.
Will I trip the circuit breaker? Will I find the cause of the vertical lines? Did I order the correct 74ALS245 package type? You'll have to watch to find out!
*
Table of Contents
0:00:00 Pre-Roll
0:02:39 Greetings and Announcements
0:05:20 Things You All Have Given Me: 3D Printed Bracket and Memories from @RetroTechChris
0:10:33 Retro Bits and Bytes Swap Meet Pick-Ups
0:16:49 Wheel of Regrets™ (Who comes up with these titles anyway?)
0:17:11 Wheel of Regrets™: My Order from @i80386sx's eBay Store (Not Actually a Regret™)
0:24:55 Wheel of Regrets™: Nintendo Game Boy DMG-01 Parts
0:45:13 Getting the Macintosh IIsi (number 2) and Other Parts
0:48:02 Yes, Apple Made a "Trident" Card (mine's bad)
0:50:17 Finishing the Power-Up-llusi, with Mods
2:16:03 Setting Up for a Power Supply Smoke Test
2:20:23 Power Supply Smoke Test Time
2:23:28 We Have a Video Signal - With Vertical Lines - from the IIsi (number 2)!
2:25:10 Let's Tackle Those Vertical Lines
4:14:02 Closing Thoughts
4:22:55 Outro
*
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
![Fixing My Apple ][+ and COMPUTER Using eBay: Cant Even Wheel of Regrets! (Computerized Start™ Live)](https://i.ytimg.com/vi/e2C_R8njKkQ/mqdefault.jpg "Fixing My Apple ][+ and COMPUTER Using eBay: Cant Even Wheel of Regrets! (Computerized Start™ Live)
YouTube started having ingest issues while I was doing the Wheel of Regrets! segment. I had to resume on a second stream: https://youtube.com/live/7E2_yCszJgg
At least I cant blame my USB microphone this time around...
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Ive launched a merch shop: https://shop.jdmcs.com - use code APPLEFOOLS for 7% off all April Apples merchandise through April 30th!
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Adam sent me an Apple ][+ that needs repairs, and COMPUTER is suffering from bad 74LS-series chips. Can I fix both computers using eBay (the place where I buy things I later regret)? Maybe. But the more important question is, Will there be regrets along the way?
Will COMPUTER say COMPUTER again? Will the Apple ][+ say APPLE ][ again? Will all the parts even arrive in time for this stream? Youll have to watch to find out!
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#AprilApples Event Logo concept and design by myself and is available at https://aprilapples.net for use with attribution when you create AprilApples content.
*
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")
