Sometimes my PRS 900 freezes. Usually when I dismount is improperly or something. If resetting doesn't work I take out the battery for about a minute. Replace the battery and then it will reboot. Hope this is useful.
Sorry just realised this may not work for the 650. I think the battery in it is not accesible by the user.
Last edited by tponzo; 03-30-2011 at 02:58 PM.
Reason: additional info
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