So, mine Clip+ bricked while changing song on Rockbox, about an hour ago but i managed to revive it. I've tried holding reset for 10-15 seconds and no reaction (normally Clip would reset), i've tried holding it for over an minute and nothing again. I hooked it to PC, nothing, heh even PC didn't recognize it. After 30 minutes i hooked it again, but this time it was laptop, and again nothing but after 15 seconds holding on reset button (while it was connected) it got back to life
I remember i had similar problem few months ago, also while changing song, Clip freezed but after reseting it, it powered on with no problem.