When I plug my macbook retina into the tv with the hdmi port, all I see is a black screen with a white mouse How do I fix this?

Recently I bought my macbook with retina display and when I plugged it into the television with using the HDMi cord it worked perfectly fine with the image on the television. But now I when I plug it in to the television it comes up with a black screen and a white mouse. Before this incident I was mucking up with the setting of the mac book and I dont know what I did wrong. Can someone tell me how to fix this ?

Howdy Lumagofe,
I was thinking that you may need to reset the iPod Nano, outlined here How to reset iPod http://support.apple.com/kb/ht1320.
Press and hold the Sleep/Wake button and Volume Down button simultaneously for at least eight seconds or until the Apple logo appears. You may need to repeat this step.
If the above step did not work, try connecting iPod to a power adapter and plug the power adapter into an electrical outlet, or connect iPod to your computer. Make sure the computer is turned on and isn't set to go to sleep. Try resetting the iPod while it is connected to power.
If that doesn't quite get the iPod going again, then it will need to be restored. Use this article to help with that Restoring iPod to factory settings http://support.apple.com/kb/ht1339.
All the very best,
Sterling

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