Is this a bad sensor?

[kim_bahnsen]

<p>Thanks everyone for responding. It's so frustrating that I can still take pictures, and most turn out well until I blow it up 150% and start seeing the noise. <br>

I did a factory reset and no change. I swapped SD cards, no change. THe RFI is a good thought, as this picture was taken in Hong Kong up on a mountain, and there were probably antennas up there too. But I've now taken this camera back and gone shooting on my own, and no change. I still see noise. I have a call in to my cc company to see if they will consider the extended warranty. <br>

Even when I preview photos on my camera before I download them, and zoom in, I can see the noise...<br>

Perhaps a free estimate into Canon would at least get an answer to cost. It was $460 so I imagine any repair will be a large chunk of the purchase price. </p>