I started here:
http://eservice.sony.com/webrma/web/index.do and entered in PRS700 and my zip code. That took me to a page with this quote:
Based upon the purchase date you entered, your unit is no longer covered under warranty. The charge for this exchange is $99.00 (plus applicable taxes).
Sony will ship to you the same or comparable Sony Factory Reconditioned model at no charge.
I called Sony instead of filling out the form online to make sure I wasn't going to have to pay $99 just to find out that they won't repair it. The date was within warranty, but I knew the repair wouldn't be under warranty so I left the date blank.