I've installed ubuntu touch on my galaxy nexus following the tutorial on the official site. However the latter is not so clear.. In particular, during the installation, user action on the phone is requested and not documented on the tutorial:

1) The phone asked me whether rebooting, wiping the cache or something else (i did nothing and the phone rebooted) 2) The phone asked me whether replacing or not cmw (or something similar). I asked no..

After the installation all seemed to work correctly. However after shutting down the phone can't power on anymore... When I push the power button the battery icon appears, showing that the battery is completely charged.

What am I supposed to do?