Technical Radio's on but no sound

[redbull2401]

Had my radio playing then all of a sudden there's no sound coming from it help please is it a fuse or is it a new speaker system

 

[fingers99]

Could simply be a loose connector.

On some radios there's a fuse on the back of the unit. I'm unsure of what it's actually for, but well worth a check while the head unit is out (checking the connector).

 

[redbull2401]

Got in the car this morning turned on the radio and it was working fine so no idea what happened but need to get it looked I think becuase It dosent work off the key I have to turn it on and off manually