I was SHOCKED when I found the problem on this Motherboard!

#electronics #repairing #pcba #jlcpcb #vintagecomputing #soldering #motherboardrepair
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In this video I am going to have a look at a broken Socket 7 motherboard, a Jetway 542c

Previous Mail video: https://youtu.be/15tkUcSzw6A

The RetroWeb link to this board: https://theretroweb.com/motherboards/s/jetway-j-542c

Take a look at DjMarik78's channel: @DjMarik78_EN

00:00 Intro & the Jetway 542C
02:05 Powering up — still dead
03:51 Thermal camera: a scorching diode
04:35 Is the diode faulty?
05:22 Mapping the VRM
13:42 Scoping the buck converter
18:41 How a buck converter actually works
25:06 Hunting the hidden load
31:33 New caps and a load test
35:05 I had no idea!
43:02 Winding a replacement
45:52 Final tests and wrap-up