what do you mean swap the bulbs arund. If you mean swithch the sides i did and it dose the same thing it did on the others.

SE or DE bulbs?

If the ballasts have ignitors they are either pulse start or HQI. Running a probe start bulb SE on either of those ballasts will work sometimes but it usually chews up the bulbs pretty fast.

If it's DE and the bulb works when connected to the other ballast output then you have a dead ballast and you will need to get it repaired.