I need to reset my radio battery was taken out and put back. No manual

I change my battery, reset the radio but I have no sound. How can I fix it?

code maybe in glove box on a sticker or plate.it also should be written down somewhere.memory saver should have been used on your car,before unhooking the battery,then you would not lose any presets for anything.if you can't locate the radio code,you will have to go to the dealer and show proof of ownership,before they give you the radio code.your car thinks the radio has been stolen!if you are going to be working on this car,an owners manual is a MUST,and can be bought from e-bay.