Unscrew the TRS housing and check for corrosion. If you have a white wire you'll see some blue coloration if that is the case, then you can simply cut that back an inch or two to clean copper and resolder the plug, helps if you can apply a tiny bit of Deoxit on the exposed wire also after. I had that happen with some old Koss, as well as more recent orthos.
Worth checking before you throw out the cable, it is frustrating though.
Some of that old copper wire is tragic almost like woven hair, but then again some is excellent
All this Z5/6/7 talk has me interested look ahead of thier time in a sense.
Already tried that. The short was initially at the left side, so I opened up the cans and redid the solder joints on both sides.
Then the plug started acting up, so I redid that as well.
Worked fine for a while, but then the cable got yanked and the right side just died completely. Not a short, just complete disconnection. Redid the plug again, checked the driver connection, not fixable. I think the cable split internally; the wires seemed pretty fragile while I was working with them.
I'm looking into an HD600 cable to replace it, as its the closest thing to the original I could find. Anyone have one sitting around (possibly after a custom recable)?