Three years later here, and this issue was never resolved for me.
I can't recall what the exact outcome of my conversation with support was, but at the time it was just unfeasible to have my Polar sent in to be repaired. Since the keys totally don't work, I used my Polar as a desktop synth for a while and then sadly it was just packed away into storage. But now my situation has changed a bit and I would very much like to use the Polar as the centre of my setup again as a master keyboard (I have no other keyed synths in my setup now) and as the synth heart of my sequenced patterns.
I am sending an email to support, but in the meantime, I thought I would just update here with the hopes of someone else having some new info on this problem.
Just to reiterate:
My Virus Polar TI2's keys do not work at all.
They do no activate any internal sounds nor do they send any data over MIDI out.
The Local Control On/Off option in the CONFIG menu disappeared when this problem started.
There is no Keyboard sub menu pages at all now.
This behaviour happens with USB plugged in using the Plug In / Virus Control,
AND just standalone with nothing but power and headphones plugged in.
The sound engine works fine and everything can still be heard with the audition buttons or externally triggered.
The mod wheel, pitch wheel, and all knobs work as they should.
I have tried all the following to no success:
Soft rest and factory restore.
Reinstall all virus control software on my mac.
Reinstall OS on the synth (5.1.6.05)
Opening up the synth to check the cable connections:
(I am well out of warranty. I simply removed the 8 screws holding down the keyboard and slid it out. I could not see anything visibly wrong with any of the ribbon cables or their connectors. In fact, all of the ribbon connectors have a blob of hot glue on top of them and/or a cable tie around the connector housing to kept them secure, and the connection between the keybed and key's logic board is heat shrinked and appeared to be sound.)
So, truly at a loss here. I guess some chip or something is burned out somewhere? and parts need to be replaced?
If anyone has any new information, please help!