Half of Candy Induction hob not Detecting Pans

[Free2Rhyme2k]

Model: PVI 640 C

Candy induction hob

All 4 rings previously worked, however the left two (front and back) have recently ceased working. I am sure that this is not caused by the pan or pan contents as I have tested the pan with the same contents on both of the right two rings, and it works fine.

When I move the pans back over to the left rings, it gives the "pan not detected" signal on the panel.

I've looked through the instructions and online and I can't see any explanations for this. Is it the case that the pan sensor circuit links the two left rings perhaps, and something may have burnt out on that side only?

Thanks in advance.