Any Giesemann Experts?

[reefmandan]

I recently acquired an Infiniti unit with a package purchase, but one bank of the T5s isn't working.

There are two cords coming from the unit, one running into what I believe is an original ballast, and the second rigged into another ballast. The original ballast has two powercords that run one MH and one bank of T5. The other ballast only has one powercord, and has a different gauge wire running into the fixture, compared to the original ballast.

I know very little about electronics, so am turning to the community. Please help!