Quote:
Originally Posted by YamahaFreak
Many thanks for the tips and sense of direction! I'll get right on it. There are darkened areas on the SMPS part of the board, though I admit to assuming those are just 'baking' of the board from residual heat over the years.
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Under normal conditions there shouldn't be enough heat to discolor the board. Might happen though if one or more capacitors mostly on the secondary side were failing. Sometimes that can make things run hot until they fail.