IPod Nano 7th Generation will not turn on

My 10 month old iPod Nano 7th Generation will not turn on - all of a sudden.
All songs on the device have disappeared.
Shows in iTunes - even shows as having a fully charged battery.
Holding Home Button and Sleep/Wake button down, even for a long time, doesn't help.
Have changed USB ports, from computer to AC powered USB charging station.
Help?
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Just saw elsewhere on the forum to press and hold the power and home buttons and it fixxed it for me