Xpantastic!

Hi there, I wonder what could be a problem with the Matrix 12 when everything else's tuning well - except RES? Filter chips should be okay. It seems to "think" for a while whilst tuning RES on voices 3 and 5, and after the tuning cycle is complete, "FAIL" appears.

Any ideas? Should we just re-check everything or are there any specific areas in which the probable source of this problem exists?

Thanks,

-P.