No sound from speakers

I have a 2015 hyndai Elantra and have no sound
from the speakers I tried the fuse I even had to
change the car battery and it didn't rest the stereo I
took the car to the dealership and they said that it
might be the stereo or speaker causing it not to
work. But they could tell with out testing it and they
would have to charge me for the service and it
even if it wasn't the speaker but the stereo then I
would have to pay for a $200 stereo