Hi QC, I did the necessary research on the isolating transformer and I fully understand it's necessity for this type of repair. However......I checked around at quite a few electrical suppliers for this type of transformer and the majority are clueless as to what I'm asking for. However, one major electrical supplier had available but these were industrial types weighing close to 1000 LBS. Not something I would consider putting on my workbench. I'll check around again tomorrow at some electronic repair and parts suppliers and see what gives. I do remember seeing these types of transformers around decades ago but can't recall the last time I saw one, especially with the 110V power cord at one end and the 110V socket on the other. If I am not successful in sourcing this transformer, can I still attempt to repair this PCB? As for the other necessary tools, I have a sturdy non-conductive bench with switched 12V, 24V and 110V supply, good work light and a trusty Fluke 77. Will add the isolation transformer once I can source it.