Nikon Europe today posted a service advisory on some of Nikon D750 camera bodies manufactured in October and November of 2014. The shutter in some Nikon D750 bodies does not function normally, sometimes resulting in shading of a portion of images. We have decided to take the following measures regarding this issue.
Identifying affected products
To check whether or not your camera is one of those affected by this issue, click Affected Product Serial Numbers below and enter your D750 serial number as instructed. Your camera’s serial number will be checked against those of applicable products. If your camera is one of those affected, instructions for requesting repairs will be displayed. If your camera is not affected by this issue, rest assured that repairs to your camera are not necessary and you may continue using your camera without concern for this issue.
Please contact your nearest Nikon service center if you own a Nikon D750 digital SLR camera to which this issue applies. They will keep your camera, and examine and repair the camera’s shutter free of charge, even if the camera’s warranty has expired.
via: Nikon EU