As my knowledge of these kind of items are limited I do not know what the problem could be or how to test it. 
When connected to power the lights turn on, this is as far as i could test the item could have any of the problems listed below. overall condition looks ok except the XPQ knob seems to be broken off please see pics.

No Power Cable included in this sale
Came from a pallet of faulty items.

What you see in the pics is what you get. 

Strictly sold as Spares/ Scraps No Returns. 


DEFINITION OF FAULTY - SPARES FOR THOSE THAT FIND IT HARD TO UNDERSTAND. 

When you bid or buy my items you are agreeing that you understood the definition of faulty/spares items thank you