Bummer!
I buy all my Photo Equipment on E-Bay, usually New York City, haven't been burned yet, and the Cust. Service is great.
Get online with Sony and see what they can do to help you. It may be something real simple, or, it may require you to ship to a Sony Service Center. They will tell you the where's and how to's.
Most camera shops rely on the camera manufacturer to be the follow up resource on problems with a product.
CompUSA is, and always has been, a ripoff.
Staffed by arrogant nerds who speak 'computerise', and always make you feel like you've been talked 'down' to!
Hope this helps.
Hope you registered the camera so you can have an option for warranty services!
Just my 2 cents.
John