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AHP AlphaTIG 200X Welder Stress Test and Repair

I purchased a 2016 model in February 2016. I stress tested it, I observed a component failure, and I repaired it using over-spec components. I made a video about everything I did, but I have received many questions from people with less electronics experience who wanted more of a step-by-step how-to video. This page aims to answer some those questions without creating another video. There are many great videos about component identification, capacitors, component removal, desoldering, soldering, parallel and series circuits, etc. and I suggest watching those since I have no intention of duplicating those efforts.

Here is the video I posted.

I made some annotations on specific video frame grabs to help clear things up. I hope this is helpful.