It also happens to me. I solved this way: - charge the batttery ( http://thpmaemo.blogspot.com/2009/12...y-in-n810.html, or with a nokia 5800). 1. remove battery 2. connect USB cable 3. start flasher-3.5 from command line http://wiki.maemo.org/Flasher#Flashe...sage_examples. 4. insert battery 5. flashing starts