Here is the complete list of links to download Apple TV Firmware directly from Apple. Never download firmware from sources other than Apple unless you really trust them, as they might have intrusive code attached.
Other Authentic Direct download links for iPhone / iPod Touch / iPad Firmware IPSW from Apple:
- Where to Download iPad Firmware From
- Where to Download iPhone Firmware from
- Where to Download iPod Touch Firmware from
Official Direct Download Links for Apple TV Firmware:
2,1 = Apple TV 2nd Generation
iOS 4 Firmware Links:
You can use Right Click > Save as to download Apple TV Firmware below.
- 4.1.0: AppleTV2,1_4.1_8M89_Restore.ipsw
- 4.2.0: AppleTV2,1_4.2_8C150_Restore.ipsw
- 4.2.1: AppleTV2,1_4.2.1_8C154_Restore.ipsw
- 4.3.0: AppleTV2,1_4.3_8F191m_Restore.ipsw