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A good way to test your camera for warm/dead pixels is to take a photo with the lens cap on. Or, if you own a camera that doesn't have a lens cap or the lens cap will interfere with the lens then go into a closet or bathroom with the lights off (complete darkness) and take a photo. The longest exposure you can get your camera to go (manual mode might provide longer shutter speeds) will show you more warm/dead pixels.
Then you can use this application to analyze the image for a detailed report.
Another info source, from climbers , is here: »webpages.charter.net/bbiggers/DC···ls.html#