Yes, ibanez wiring can seem a bit excessive as they have one wire per every connection, so 3 for each of the volume, bass, treble, mid, power and jack, normally in one strip along the side in quite a large connector. So when you say the mid is not working, does it sound like it is just flat or cut or boosted?
Not had too much trouble with ibanez boards and the wiring is normally robust (or maybe over robust), but worth checking out the cables. The wiring diagram for the generic 3 band EQ is somewhere on one of the ibanez threads on here.