Nikon D3400 User Manual download pdf (Page 306)

282 Technical Notes

If the camera fails to function as expected, check the list of

common problems below before consulting your retailer or

Nikon-authorized service representative.

Battery/Display

Troubleshooting

The camera is on but does not respond: Wait for recording to end.

If the

problem persists, turn the camera off.

If the camera does not turn off,

remove and reinsert the battery or, if you are using an AC adapter,

disconnect and reconnect the AC adapter.

Note that although any data

currently being recorded will be lost, data that have already been

recorded will not be affected by removing or disconnecting the power

source.

The camera takes time to turn off: The camera is performing an image sensor

check.

Do not remove the battery or disconnect the AC adapter until the

camera has turned off.

Viewfinder is out of focus: Adjust viewfinder focus (0 26).

If this does not

correct the problem, select single-servo autofocus (AF-S; 0 69), single-

point AF (c; 0 74), and the center focus point, and then frame a high-

contrast subject in the center focus point and press the shutter-release

button halfway to focus the camera.

With the camera in focus, use the

diopter adjustment control to bring the subject into clear focus in the

viewfinder.

If necessary, viewfinder focus can be further adjusted using

optional corrective lenses (0 268).

Displays turn off without warning: Choose longer delays for Auto off timers

(0 207).

Information display does not appear in monitor: Shutter-release button is

pressed halfway.

If information display does not appear when you

remove your finger from shutter-release button, confirm that On is

selected for Auto info display (0 206) and that battery is charged.

Viewfinder display is unresponsive and dim: The response times and brightness

of this display vary with temperature.

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Nikon D3400 User Manual Page 306