If you have no sound in any app whatsoever without using headphones, try resetting the iPad by holding down on the sleep and home buttons at the same time until the Apple logo appears on the screen.
If you still have sound in the music app without using headphones, system sounds are muted.
System sounds can be muted and controlled two different ways. The screen lock rotation can be controlled in the same manner as well.
Settings>General>Use Side Switch to: Mute System sounds. If this option is selected, the switch on the side of the iPad above the volume rocker will mute system sounds.
If you choose Lock Screen Rotation, then the switch locks the screen. If the screen is locked, you will see a lock icon in the upper right corner next to the battery indicator gauge.
If you have the side switch set to lock screen rotation then the system sound control is in the control center. Swipe up from the bottom of the screen to get to control center . Tap on the bell icon and system sounds will return.
If you have the side switch set to mute system sounds, then the screen lock can be accessed in the same manner as described above.
This support article from Apple explains how the side switch works.
You can also try cleaning the dock connector opening with a soft brush. Sometimes dirt or debris in the opening can cause sound problems.
Try this - Reset the iPad by holding down on the Sleep and Home buttons at the same time for about 10-15 seconds until the Apple Logo appears - ignore the red slider - let go of the buttons. (This is equivalent to rebooting your computer.)
Check your settings. The iPads have a small switch on the right edge. It can be used as a rotation lock to keep the screen from automatically reorienting itself as you move around, but you need to have the tablet’s settings configured properly. That same switch, right above the volume buttons, can also be set to function instead as a mute button to silence certain types of audio.
If the switch is set to work as a mute button, you can change its purpose to “screen-rotation lock” by tapping the Settings icon on the home screen. On the Settings screen, tap General on the left side, and on the right side of the screen flick down to “Use Side Switch to.” Tap to select Lock Rotation or Mute to set the button’s function. Even if you set the side switch for your preferred use, you can still mute the Mini or lock the screen. Just double-click the Home button, and when the panel of apps appears along the bottom edge of the screen, flick the row from left to right with your finger. Tap the icon on the far left side of the row to either lock the iPad’s screen or mute the iPad’s alerts, notifications and sound effects. Music, podcasts and video are not muted unless you turn the volume all the way down.
iPhone: Can't hear through the receiver or speakers
I'm having this same problem with my iPad mini. It was fine last night, and out of the blue today it thinks I have headphones connected. I don't have a microscopic brush to clean the tiny hole for the headset. I've done a hard reset and that didn't work. Any other suggestions? Really sorry I didn't go with the Surface...
Our ipad played alert noises, ringtones etc although it was not a 3g pad - wireless only. No music or sound from video or webpages could be heard through the speaker. only headphones. Tried reset etc. to no avail.
What worked for us was - to use the correct charging lead that came with the ipad and not another generic lead or lead that came with another product such as an iphone. When we isolated which lead it was, it was used to recharge the ipad overnight. At first sound returned to some apps but not music and the next day all functionality seemed to be restored.
alhamdulillah! ("Praise to God")
I tried restart it didn't work. What worked for me straight away was to switch on my Bluetooth and send the sound to a active Bluetooth device. I my case it was a (7 Day Shop Audio Bluetooth Plug). This meant iPad sound was now playing via bluetooth. I then turned off the Bluetooth and my audio was now back to normal.