iPad 3 no sound speakers only on headphones. HELP!

Hello everyone!

Please help me, I have an iPad 3, that I bought for my boyfriend on june 2012, after over a year of use, everything had worked perfectly till' now. The iPad started to have problems with sound through speakers, every time it were less and less what you can hear, and then we started using headphone to hear better. Suddendly the sound went out, and now we have NO SOUND on speakers, only on headphones, BTW the microphone works!

We have tried everything, nothing makes the sound come back.

I have tried the following:

• System restore
• iPad reset (soft reset, hold home and lock buttons for about 15 seconds till apple comes up)
• Clean the headphone jack
• Clean the charger cable and connector
• Change the side switch from screen rotation to mute and viceversa
• Use control center to mute / unmute
• Change volume control to buttons and viceversa
• Reset all settings
• Erase all content and settings
• Use of Assistive touch to manually turn up volume, unmute and mute, etc...

The sound comes only from headphones, and works perfectly with them, we have sound on games, notifications, music and everything else, it's just that sound doesn't come out from speakers.

The problem started since september, when the iOS 7 update was done. 😟

But it got worse over the 7.0.4 update...

Any ideas on how to fix this?

Pleaseeee help!