Xbox 360 controller does not sync

what you should do is first turn off the Xbox 360. Then sync the controller if that does work good, but if it does not try going on Xbox 360 Wireless controller problems you can always change batteries if that's the proplem

The A/V Cable Set-up does not matter what I would do is sync it with you Xbox 360 console first, and when using it point it directly at the Xbox 360 console as it's infra-red is not as good as the Xbox 360 game controllers.

To sync the remote press the sync button on the Xbox 360 console, then press the Xbox button on the media remote.

Try using that same controller on a friend's 360 (don't forget to sync it). If it still does the same thing, then it's definately the controller, otherwise it's your xbox.

hey thanks for the help I tried turning it on manual and the controller sync but after that it won't sync anymore and the lights keep on flashing on the controller. when I try to go sync it with the 360 but the 360 doesn't pick it up and the lights still
flash on the controller. what does this also mean?

No controller sync. As stated above I even tried a wired official xbox controller. I was hoping I'd be able to do the update blind if I could get a controller to work. However, my Harmony remote controls my 360 without sync, including ABXY and although
it powers on and off the 360 presently, it does nothing else.