the hard reset procedure is slightly different for the 700 than for the 505, since they don't have the same buttons. i found this information on the sonystyle site, in their
support / faq and solutions section.
WARNING: A hard reset will erase all content on the Reader.
1. Ensure the Reader is powered off by checking that the indicator next to the power button [FIG. 1] is not illuminated.
2. On the back of the Reader, using the stylus, press the
RESET button.
3. Turn on the Reader.
4. While the screen displays
Starting up... , simultaneously press and hold down the back [FIG. 2] button and the VOL + button until the
Reset All screen is displayed.
NOTE: If
Starting up... does not display on the screen, charge the Reader's battery for several hours before attempting the reset process again.
5. Touch
Yes to reset the Reader.
hopefully charging it with the psp charger will do the trick.
good luck !