Apple TV (1st generation) - Manual (Page 24)

24 Chapter 3 Ready, set, watch.
When you’ve successfully paired your Apple Remote, Apple TV displays a chainlink
( ) symbol above a picture of a remote. Apple TV now works only with the paired
remote.
Unpairing Apple TV with a Remote
If you lose the Apple Remote that you paired with Apple TV, you can use any Apple
Remote to unpair Apple TV from the lost remote by pressing and holding » and ]
for 6 seconds. You can also follow these steps.
To unpair Apple TV from a previously paired remote:
1 Choose Settings from the Apple TV main menu.
2 Choose Unpair Remote.
When you’ve successfully unpaired the lost remote, Apple TV displays a broken
chainlink ( ) symbol above an image of a remote. You can now pair Apple TV with
a new Apple Remote.