Quoted from snyper2099:

I understand this. It is not the case with the power supply in question. Although some of the resistors could have suffered from this deterioration and had the correct color bands, others on that same board HAD the wrong banded colors on them, and were installed from the factory that way. I have been doing this long enough to tell if a board came out of the oven that way, or if it had some components replaced at some point. The bands were incorrectly read from the factory in that case (grey for blue in that specific example). The lesson to be learned is not to assume the correct parts were installed from and factory producing boards.