UJF-3042MkIIEx - Diagnosing Head Thermistor Error

Hello all,
I've got myself into a bit of a jam with a 3042Mk2, I've gotten a Error 108 - HDThermis error, and the service manual states to:
1. Check FFC connection between the Slider T PCB
and the head which is displayed error.
2. Replace the Slider T PCB with a new one.
(Refer to 3.3.2)
3. Replace the print head with a new one.
(Refer to 3.1.1)

I've checked the ffc cables and the fuses on the slider PCB, fuses are fine and the cables seem fine (should I check each ffc cable for continuity? I only re-seated them).


Is there any way to ascertain whether it is the PCB or the print head? No one seems to have a slider PCB in stock and the wait is a month, which we just can't afford right now, nor the extra time should it turn out ti be the print head. These are also expensive parts to play trial and error with, and mimaki's techs and other company's techs can't seem to help much, minimum 1 month wait to see a tech.

Thanks,
notarobot