Your problem may have nothing to do with the speakers at all. The problem may be in the headphone jack, which contains a switch to deactivate the speaker when headphones are used. There maybe some foreign matter in the socket which is causing the problem. Try shining a light into the socket to check. If there is something in there, try vacuuming it out. Here's a thought. Have you checked in settings to make sure that the mute switch is not set to on? If the side switch is set to mute, and has been moved down, showing the red mark, your speaker will not work.
.
if your side switch is set to rotation lock, check in the multi tasking bar to see if the mute has been activated.
If none of this helps, you may have a hardware fault. In that case have your iPad checked out at an Apple store. If the problem is covered by the warranty, you'll get a replacement iPad. If you back up your iPad before going to the Apple store, you can set up the replacement from the backup you made.
Did you drop your iPad or anything? Sounds like a blue wire issue. Good luck and I hope you get it resolved soon!
