Those cables inside all do look very similar. Any chance the cable for the pitch/mod board output has been (inadvertently, perhaps by the previous owner) inserted into the headphone/pedal socket input
on the connector board, and vice versa?
Someone has had a similar problem with that in the past.
Here's a pic of my Indigo (the Polar may be similar) showing just how similar those cables are:
Try switching just the inputs of the headphone/pedal and pitch/mod wheel cables. Guessing you have the mainboard cable in the correct place or you'd have different symptoms.
PS > And another thing! Will the Ti|3 have user customisable/importable wavetables?
A ribbon-controller or XY-Pad might be nice, too, please! Thanks!