Tims Retro Corner | A Pair of Plus/4s Pose Problems, Will I get them to work, or even make one working machine? @TimsRetroCorner | Uploaded October 2024 | Updated October 2024, 1 hour ago.
Thanks to PCBWay pcbway.com/g/3DeAat for great PCBs from $5! I got a pair of Commodore Plus/4 machines that were described as "not working". Let's see is we can figure out what's wrong with them, and maybe get them working.

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00:00 - Introduction
01:02 - Power On Test - Machine 1
01:38 - Power On Test - Machine 2
02:15 - Sponsor Ad
02:53 - Disassemble Number 2
04:35 - Check Voltages
07:04 - Removing the Power Switch
10:09 - Chip Testing in the C16
16:19 - Disassemble Number 1
19:39 - Let’s Use Our Known Working TED…
21:31 - Diag264: You’re Up!
28:08 - RAM Tests
32:10 - Diag Test with New RAM