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I have a 7D Mark II camera body. I noticed today it takes 30 seconds to display after I turn the camera on. I seem to remember it coming up faster. The LCD panel on the top comes up immediately. Is this 30 second lag the way it’s supposed to be. Do others experience the same thing. I thought the display came up within a few seconds. My batteries seem fine.
Normally, you should see the LED blink for the memory card, followed the “Cleaning” message. After that, my camera screen is blank until I press a key to cause it to display something.
Do you see the LED blink? If not, you could have a bad card. I would remove both, and see if the problem goes away. Remove any lens, too. Test just the body by itself. If it fails, reset the camera. If it still fails, contact Canon support.
If it powers up without a lens and memory cards, start adding them one by one, and retesting startup. You need to isolate what is bad, camera, lens, or one of the memory cards.