First off, Robert, thanks for the offer of assistance from Astak. It is good to see the comments regarding your help on here are certainly accurate.
Secondly, I have had no problems with my EZ reader since I switched to epub. I used calibre to convert them to mobi so maybe that was the issue (although I used it to convert to epub and they work great). Plus, having used both, I prefer epub so no harm done.
Given the fact everything seems to be working fine (and, yes, Robert, it does turn on when I plug it in so my cable is good), I think the device is fine. Likely, the cause was user error
Thanks to everyone for their assistance