Reactivate the system sounds

[leodis]

Greetings, I have a problem with my wildfire with cyano nightly. I do not know how, but a couple of days I have no system sounds. When you turn on or off the screen and when I was writing the sounds emitted. Not any more. I upgraded to the 231, I also tried to turn everything I could, but I have not solved. For the rest of the phone works and then I think I have busted some settings, but do not know what.
Does anyone have any ideas?

 

[samrox144]

using file explorer check in system/media/audio folder
if the files are there are not.....

 

[leodis]

using file explorer check in system/media/audio folder
if the files are there are not.....

There are folders Alarms, Notifications, Ringtones and UI.
All folders containing music files .ogg.
In folder UI are just the sounds that are missing ...