I had a similar problem with my PRS-600 (occurred twice IIRC) and just kept resetting etc. till it worked again. Then it was good for a year perhaps.
In one instance I think it was totally discharged and then worked when I connected it to the USB port on computer. The other was some random thing like resetting it with pen while pushing different front buttons.
Not saying these will work for you, but I wouldn't give up without a fight.
Helen
Edit: I would leave the SD card out while doing it and maybe delete any books on device card as well although I left books on mine at the time.
Last edited by speakingtohe; 12-07-2013 at 03:14 AM.
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