Do you have an external display/TV you can connect to the laptop? If so, you might be able to see the enter message on the second screen. You have have to toggle the display settings (usually a FN key you press) to change the output mode (internal display only, internal and external display, external only).
My friends and family think it was stepped on accidentally, but I don't recall me or anyone else stepping on it. It's likely that's what happened though