Grounding A Preamp

I didn't check the interconnects for corrosion. I did change the ICs that go between the amp and the preamp. allow me to clarify one thing: when I touch the preamp, SOMETIMES the buzz goes away, but not always. I figured that if I stopped the preamp from buzzing, I would leave that unit powered on while not listening. The amp, and everything else was shut off. That practice didn't work either. The buzz was there when I turned the amp on again.

Licoricepizza,
Question:
If you select, say, CD for the listening input on the preamp, is the buzz present?

If not and it is only present when the preamp listen selector switch is set to phono..... there may very well be a problem with the preamp.

All the inputs except phono are dead quiet. I do know how to wield a soldering iron, so I guess I'll have to get out the Fluke meter, and tear apart the preamp...