1. First, make sure that the sound is not checked to be muted.
2. Make sure that you have a text-to-speech (TTS) voice selected in the language menu.
3. When you press a function on the screen, do you hear a beep? If so, this indicates that the sound is not muted and that the audio circuits are working. If you don't hear any beeps when pressing a function on the screen AND there are no voice directions, then I would suspect a defective speaker. More information can be found here:
SHARCNET USA Out of Warranty GPS Digital Camera Repair
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