TV Screen says "No signal" when I try to use apple TV. Was working. ie Little Apple symbol would appear on TV screen, but now get "No signal" Internet connection working (light on apple TV)...tried new HDMI cable but still "No signal"

TV Screen says "No signal" when I try to use apple TV. Was working. ie Little Apple symbol would appear on TV screen, but now get "No signal" Internet connection working (light on apple TV)...tried new HDMI cable but still "No signal" HELP please

Same exact problem with my Apple TV. Worked like a charm the first two times we used it. Haven't used it in about a month, now no Apple logo when I turn it on, or the logo appears momentarily and distorted, and then an error message from my Samsung HD TV: Mode Not Supported.
What changed?
Bill O'Rourke
***@***********.com
<Email Edited by Host>

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If the iPod is no longer recognized in iTunes click here. iOS: Device not recognized in iTunes for Windows
In the future when posting for help, please respond to your original question.
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Hello Ben.
It's possible that you are having a problem with some Firefox add-on that is hindering your Firefox's normal behavior. Have you tried disabling all add-ons (just to check), to see if Firefox goes back to normal?
Whenever you have a problem with Firefox, whatever it is, you should make sure it's not caused by one (or more than one) of your installed add-ons, be it an extension, a theme or a plugin. To do that easily and cleanly, run Firefox in [http://support.mozilla.com/en-US/kb/Safe+Mode safe mode] (don't forget to select ''Disable all add-ons'' when you start safe mode). If the problem disappears, you know it's from an add-on. Disable them all in normal mode, and enable them one at a time until you find the source of the problem. See [http://support.mozilla.com/en-US/kb/Troubleshooting+extensions+and+themes this article] for information about troubleshooting extensions and theme and [https://support.mozilla.com/en-US/kb/Troubleshooting+plugins this one] for plugins.
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http://support.apple.com/kb/ht1212
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TV Screen says "No signal" when I try to use apple TV. Was working. ie Little Apple symbol would appear on TV screen, but now get "No signal" Internet connection working (light on apple TV)...tried new HDMI cable but still "No signal"

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