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Any one willing to help isolate the low ESR on my map?

Essentially everything on the secondary side (within dotted line) that's a filter/decoupling cap (i.e. directly connected to a rail going to an output wire).

The 2200uF, 330uF, 220uF for sure, possibly the 82uF and 10uF as well. They all look to belong to the same series, often printed on the label itself.
 
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