Logitech headset 350 win7 64 not working i don find a win7 driver

SOURCE: Logitech 350 Headset Casing

Had the same problem, no headphone speakers would work.
First use a flat head screwdriver and insert in between leather padding
and plastic case and pry apart. Best to start at one area, insert a wedge
and pry further along. It will take a bit of force before it pops apart.

Take out 4 small philips screws

I found that the wire had broke right at the entry grommet. I pulled the
wire through and wiggled it and the speakers went on and off.

In my case I felt it was best to redo all the wiring. I first took these pictures
to have a map and pulled through an extra 4" of wire through and cut/desoldered
the wires.
Here are the original wiring connections at the speaker
and what must be the common. This was the wire that was broken
inside.

I re-soldered all the connections and separated them as best I could with
electrical tape (no shrink). Put everything back together and so far
seems to work fine.