I just updated my AVIC Z1 with an Ebay 40GB hard drive with the 2010 maps and now it will not play any CD or DVD (all are store bought disks-old and new). It copied 2 CD's to the Library then....."unreadable disk". I have tried everything from resetting, re-installing the original hard drive and disconnecting the battery. Still nothing.... Note: I did have the "light flash" bypass when I updated the HDD, not sure if that was the problem. I just changed to the 2 wire bypass and .....still nothing. I have read that others have had similar problems when updating. Any ideas if it is a firmware problem??

Thanks,

Kevin