Received one of these in June turned it on this morning worked for 10 minutes then black screen, still working but no screen any ideas ?

Tried rebooting it (press and hold the ON/OFF button for several seconds)?

How do you know it is still working if the screen is blank?

Does the charging light come on when you charge it?

When using iPlayer Radio and similar the screen on mine blanks automatically while still playing. Sure it is not something as simple as that?

Thanks for the replies I know its black screen as it still makes sounds and some icons are lit up.
anyway,googled it and rebooted (held down the power key and volume control screen came back what a relief.