I bought a Sprocket 200 for my daugher for Christmas. Initial setup and connection to her phone was fine, and she was able to print a number of photos. The sprocket was then turned off and has subsequently failed to reconnect to her phone. I have:
1) tried a reset using the small button under the paper cover
2) tried a factory reset using the HP instructions (holding the power button until the light flashes green, then pressing the power button again)
3) tried connecting to the sprocket from a new device
None of the above have enabled me to connect to the sprocket. I believe that it is no longer bluetooth discoverable.
Furthermore, the factory reset does not appear to have worked -- the sprocket still displays the custom LED light colour.