yeah tried them all and on my hub, it was doing some kind of strange flicker via the backlights a few weeks ago but kept working fine
I presume you've checked for bends, cracks, kinks in the wire - particularly around the connection point?
Now, this is probably not good advice, but an anecdote... my old Razer Deathadder mouse did something similar - first, flickering lights, then erratic clicking, then dead. I held it by the cord and bonked it against my pillow several times. It's been working fine for the past six years (and is still in use now). I'm guessing some loose connection inside. As it's out of warranty, you could try giving it shake, or (probably more sensibly) opening it up and seeing if you can see any loose connections.
