I tried turning on my camera but nothing is being displayed.

You can purchase replacement glass covers for the LCD. To replace, heat up the screen with a hair dryer to soften the adhesive, then use a suction cup to pull it off. You may need to apply tape to the cracked area to get a good seal.

You may need to use the Nikon D7000’s AF Fine tuning feature to correct for differences in manufacturing. You may also need to take your camera to a repair shop for adjustment. For more information, see the troubleshooting page.