Autometer service??

I just bought (a week ago) a Electric Nitrous Gauge cobalt, from an Ebay Store. I installed it and it worked fine, it read the pressure. But I notice that the face of the face wouldn't light up. So I called autometer they told me to send it over. This sucks I pay $180 for this gauge and it doesn't work properly. Has any of you guys/gals being in this type of situation? How long would it take for them to send it back? Thanks, I just hope my Cobalt Tach doesn't have the same problem, I'm waiting for my tach adapter to connect it.

P.S. I did installed it correctly, this is not my first gauge or nothing like this.