Mp3 player says key locked system shut down
I had this same problem on another RCA player.. with no instructions manual it was hard to figure out what keys locked meant. Then I noticed a little slider on the side of the player, it has a little icon of a pad lock on it. Once I slid this back, the keys lock problem went away and I was able to listen to my music once again.
My best guess of what keys locked means.. you don't want you mp3 player to turn on when you put it in your pocket with your keys, so you change the slider to be locked, when your sit down and your keys are pressing against your on button, the mp3 player will shut off... as we all have experienced in frustration.. saving your battery.
Perhaps RCA should make this slider bright orange so it pops out and does not blend in so much, or they should put it right next to the on button.