Sync button not connecting controllers !!!!

Double tap the sync button on the controller, then try connecting the controller to the console.

While the controller is flashing, press the sync button on both the controller and console to re-sync the connection. Try this while the controller is wired to the console with a USB cord.

Had you tried holding the power button on the console for 10 seconds until it shuts down? If not give that a shot and see if it helps.

Also, if the controllers are not connecting properly try holding the sync buttons to see if that helps. The sync button on the controller is at the front and the sync button on the console is on the left side just in front of the usb port. Be sure to hold
the buttons until the Home button on the controller flashes.

Hey there MoltenMedua10. There are 2 ways to do this, either connect the control pads to the console via the charging cable (which will automatically sync them to the console) Or, sync them manually. If you are using the SLIM xbox, the sync button can be
found on the face of the xbox, just next to where the USB ports are. Press that, and then at the same time press the sync button on your control pad (on the roof of the control pad you will see a small circular button just next to the charge input). For the
older consoles, the sync button can be found next to the disk tray (its a small round button).

Here is an in depth guide that will show you exactly what to do.

support.xbox.com/.../connecting-game-controllers

Is the controller new? has it been working before?

Try to press the sync button on the controller and the Xbox console. More details can be found here on connecting your wireless controller to Xbox consoles:

https://beta.support.xbox.com/help/hardware-network/controller/connect-a-wireless-controller

I bought it used froma friend he had it working on his console but when I got it the sync button was pushed in all the way. Then I opened up the contoller to find the sync button has completely broken off and rattles around in my contoller so pressing the
sync button on my controller is not possible