The Power Supply Repair Saga Continues: FOUR More Faults?!

Published at : 23 Dec 2025

Thanks PCBWay for sponsoring this video: https://pcbway.com/g/M525r4
#smpsrepair #powersupply #repair #electronics #soldering
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Modular Power Supply repair series:
Part 1: https://youtu.be/tXfq3Zio8Zc
Part 2: this video

@DjMarik78 repair videos:
PSU #1: https://www.youtube.com/watch?v=DkI79_qRg3Y
PSU #2: https://www.youtube.com/watch?v=tpXQfubhOfs

00:00 Intro
01:30 Testing PSU#1
04:13 Fixing Shipping damage
06:15 Testing PSU #2
07:01 Mitigations: TVS
16:21 Mitigations: Varistor
18:01 Fan board bad design
19:12 Checking logic
26:49 Logic diagnostic
37:01 Logic repair
42:21 One more fault!
45:11 Finally fixed!
46:01 Outro