Issue Powering on a SolaPix 7

I have a SolaPiz 7 that won't power on. The power cable has been tested and working. The power is hot and tested.

Also there is power running through the fixture in to the next fixture, which is powering on as if nothing's wrong.

But in the problem fixture there is no motor, no resistance, no screen and when a DMX CAT is connected, it can't find it.

Any thoughts?

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