First, you have a lot of company. There are a lot of Bottleheads who have melted the power switches.
Sorry, I don't have a part number. Doc will probably have one for you when he sees the post.
The power switch should interrupt the incoming hot lead, the black from the wall, blue (I think) from the power cord. The white should not have anything to do with it. That is the "neutral return" to the wall.
Wait, you might have an aftermarket power switch that is illuminated. If so, the neutral is there for the return on the light only. Can't say for sure, but that is my best guess.