my headphones that plug-in stopped working.

Hello finexpress,

To help resolve this issue, try using the headphones with another device. You can also try a different set of headphones with the iPad. This will let you know if the issue is with the iPad or the headphones.

Also, unplug the headphones and restart the iPad to see if there's any change:

How to restart an iPad without a Home button

1. Press and hold either volume button and the top button until the power off slider appears.

2. Drag the slider, then wait 30 seconds for your device to turn off. If your device is frozen or unresponsive, force restart your device.

3. To turn your device back on, press and hold the top button until you see the Apple logo.

How to restart an iPad with a Home button

1. Press and hold the top button until the power off slider appears.

2. Drag the slider, then wait for 30 seconds for your device to turn off. If your device is frozen or unresponsive, force restart your device.

3. To turn your device back on, press and hold the top button until you see the Apple logo.

Here are additional steps to help resolve this issue: If your headphones don't work with your iPhone, iPad, or iPod touch - Apple Support

Thanks for using the Apple Support Communities, and have a great day!