Hey there Rac5,
It sounds like your iPod Nano 7th gen is not turning on suddenly. I would use these troubleshooting steps from the following article named:
iPod nano (7th generation): Hardware troubleshooting
http://support.apple.com/kb/TS4433
- Connect iPod to power for at least ten minutes to ensure that the battery has enough charge to allow iPod to turn on.
- If iPod does not turn on after ten minutes, try resetting it while it is still connected to power. Reset the iPod by holding down the Sleep/Wake button and the Home button for at least six seconds or until you see the Apple logo appear.
- If the Apple logo appears on the display, connect iPod to a computer and verify that it appears in iTunes and can play music. If iPod appears in iTunes and can play music, no further troubleshooting is needed.
- If the screen remains dark and will not turn on, then your iPod may need service.
Thank you for using Apple Support Communities.
All the best,
Sterling