Ok, in device manager when not in TWRP I've managed to get it to show up in device manager, listed under "Android Phone" as "Android ADB Interface". This is a start - however, this only works when the xperia s is showing the "sony" logo - i.e. when I reboot and don't press vol+, it stays on the "sony" loading screen forever. When I reboot into TWRP, the phone disappears from device manager, even when I'm running TWRP's ADB sideloader.
Clicking "mount" in TWRP does nothing either, so I can't transfer a ROM over by drag'n'drop.
So it shows up in ADB as offline when on the sony screen, and is completely noncommunicative when in TWRP. FFFFUUUUUU how will I ever get this working?
Basically, my only hope is probably ADB. The phone is either recognised but offline, or doesn't even show up in device manager let alone ADB.
Last edited by IceQubed; 1st July 2014 at 11:39 PM.