Nikon D3100 2 manual 189

Focus does not lock when shutter-release button is pressed halfway: Use AE-L/AF-L button to lock focus when live view is off and AF-C is selected for focus mode or when photographing moving subjects in AF-A mode (0 60).

Can not select focus point:

•eAuto-area AF selected for AF-area mode > Viewfinder (0 58), or Face-priority AF selected for AF-area mode > Live view/movie (0 38): choose another mode.

•Press shutter-release button halfway to turn monitor off or activate exposure meters (0 27).

Subject-tracking AF not available: Select a non-monochrome Picture Control (0 94).

Can not select AF-area mode: Manual focus selected (0 38, 55).

Image size can not be changed: Image quality set to NEF (RAW) or NEF (RAW) + JPEG fine (0 65).

Camera is slow to record photos: Turn noise reduction off (0 134).

Noise (randomly-spaced bright pixels, fog, or lines) appear in photos:

•Choose lower ISO sensitivity or turn noise reduction on (0 134).

•Shutter speed is slower than 8 s: use noise reduction (0 134).

Smudges appear in photographs: Clean front and rear lens elements. If problem persists, perform image sensor cleaning (0 180).

Date is not imprinted on photos: Image quality set to NEF (RAW) or NEF (RAW) + JPEG fine (0 65, 147).

Sound is not recorded with movies: Off is selected for Movie settings > Sound (0 47).

Flicker or banding appears during live view or movie recording: Choose an option for Flicker reduction that matches the frequency of the local AC power supply (0 139).

Menu item can not be selected: Some options are not available in all modes.

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