Pioneer AVH-P7500 problem

I have a AVH-P7500 Pioneer h/u. I purchased it a month ago on Ebay and it was factory remanufactured. It worked fine for maybe 2 weeks and all of a sudden it started to malfunction. It would play a cd/dvd one day and next day it wouldnt play it (same cd). It would say "disc not playable". Its really frustrating, since I just paid big bucks for it. Could anyone tell me what it could be? I dont think I have warranty since it was purchased on Ebay.

buy a warranty through ebay goto the services link and it should be on that page. Never buy remanufactured stuff cuz 90% of the time it just has the same problem againBest Buy Installer

thanks for the info, someone has also told me that its the transporter that is malfunctioning.  I will take it to a local shop here, hope they can fix it.