Translation:Turn on the radio and listen to the music.
I have just done the same. "Switch on" is perfectly Ok but still not allowed on 5/7/17
I see nothing wrong with ‘switch on’...except when I think of the verb ‘to switch on’, I imagine turning on the radio with a switch and I have not seen radio with a switch. However, this is a logical issue and not a language one. Report it the next time!