Xbox not flashing when pairing

My Xbox Wireless Controller won't connect to my Bluetooth at all but it connects by USB to my computer, it also flashes when I click the pairing button and my Bluetooth is turned on, whenever I go to the pair devices and try to pair the Xbox controller
it doesn't show up. Is there a way I can reset the controller without the console?

Its suppose to flash when pairing also what are you trying to pair it to

just asking but have you tried both pairing buttons. One on the controller and one on the Xbox. Make sure you hold down the button on the controller. It should start flashing when ready to pair with the Xbox.

Followed the steps you've advised.

Still behaving the same way.

When trying to pair, the Xbox and Controller just flash and never connect.

Just using the sync button as you describe didn't work. The controller would not pair with the PC again while the xbox was on. I presume because it had an active pairing with the xbox which overruled everything else. The silver xbox button just flashed
for several minutes without anything happening.

I had to unplug the xbox so it could not switch itself on when the controller was turned on, then pair with the PC.

Headset is turtle beach stealth 700. Push pairing button on xbox, and on headset, both lights flash until the console gives up. Light on headset continuously flashes.

I managed to pair the headset to my phone, so I know that works.

Any help is appreciated.