Verify your tablet is not muted by making sure your side switch is set to OFF (no orange dot showing). If your side switch is used to lock the orientation:
- Double tap the home button. This will bring up your multi-tasking bar.
- Swipe the bar from left to right to reveal your audio controls. On the far left is your mute setting (speaker icon).
- If you see a slash-through on the speaker icon, tap it to unmute.