CD changer woes....think I need a good repair shop....

[CrazyOneToo]

I recently bought a 6 disk changer on eBay. I know I know.
The cd changer does not work and I am looking for a place to repair it. There are none in my area that I can find. I am willing to ship it off for a reasonable and quality repair. Just making sure the issue isn't with my X5 or the install.

Not sure what it is so I don't know if I have DSP. When I hook the player up in my X5 the stereo shows "CD ERROR". I tried it in my E46 to see if that would work. It showed "CH CHECK" and never did anything else. I also hooked the changer from my E46 up in my X5 and it worked perfectly right off. At the insistence of the seller that it does indeed work, I unhooked my battery to maybe jumpstart it. No luck. The changer has some sort of jack on it that looks like the antenna hookup but I didn't see a cable in my truck. The changer is a 6512 6 913 390 as shown below