How do I stop the transmitter

Hint 1 of 5:

You'll be amazed at how simple it is.

Hint 2 of 5:

Work your way east through the boulders to the base of the volcano.

Hint 3 of 5:

Then go up the side of the volcano, and into the crater.

Hint 4 of 5:

Explore till you find the ladder up, then climb.