Another ATX power supply repair video, where things are not as they appear, and I get confused by more red herrings. After extolling the virtues of visual inspection, Murphy turns all that on its head, in a repair where visibly damaged components work perfectly, and dead components look perfect.

0:00 - Introduction
0:22 - Quick overview of a Dim Bulb Tester
2:49 - Initial diagnostic with the light-bulb
3:50 - A quick diagnostic on the secondary side
5:29 - A note about some Dell "ATX" PSU wiring
6:21 - Verifying output (or lack thereof) on the +5vSB rail
6:56 - Looking further into the +5vSB rail
9:29 - Disassembling the power supply
10:41 - Investigating the PSU layout
12:07 - Notes on visual inspection of components
14:02 - I spy with my little eye
16:50 - Confused by Murphy once again!
18:32 - The penny begins its descent?
19:29 - The first smart idea
20:42 - Speculating on possible suspect parts
22:20 - Some more testing & speculation
23:03 - Rumination & ideas on short tracing
26:14 - Finally checking the diode I suspected in the beginning
28:01 - Looking up a datasheet
29:32 - Thoughts on such early component failure
30:33 - An (un)suitable replacement diode
31:55 - Installing the test diode
32:51 - The dawn of realisation finally breaks
33:18 - Setting up for testing
35:06 - The power up test
36:47 - Conclusion







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| Repair Notes |
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Power Supply: Zalman ZM400-GVN

Symptoms: PSU appears dead, all outputs are zero volts & supply will not power up.
Fault: Shorted rectifier diode (SR640) in +5vSB power supply circuit.
Solution: Replace +5vSB rectifier diode.
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