I did on the D164, but I already have it pulled "halfway out, so I have to get to the green side of the power board to put it back..any tips?
How'd you pull it out without desoldering from the green side?
You might be able to get to some of the board with the iron if you take the side bar off the amp (have to hold the transformer / be careful once that brace is removed since it provides most of the structural support) but at least in my experience I had to remove the 4 caps to be able to solder on that board properly.
I'd also diode test D167 both ways in-circuit (easy) just because I've seen that guy failed in similar amps before. Probably not the issue but worth checking.