Stereo has no sound after installing new battery in Honda element?
Honda radios have a security feature which prevents their use if
they are stolen.
This security feature is activated if the radio is disconnected
from the battery (I.E. battery in car replaced).
There should be a security code in your owners manual. Enter the
correct code, and the radio will work.
If you don't have the original owners manual, (or you can't find
the information), you will have to go to a Honda dealer. They will
have to verify ownership of the car/radio and can then look up the
code.