Nikon D40 Owner's Manual page 121

Problem
Image in viewfinder is not in focus.
AF-assist illuminator does not light.
Shutter release is disabled.
No photo taken when remote con-
trol shutter-release
pressed.
Only one shot taken each time shut-
ter-release button is pressed in con-
tinuous shooting mode.
Camera is slow to record photos.
Date of recording is not correct.
Final photo is larger than area
shown in viewfinder.
Randomly-spaced bright
("noise") appears in photographs.
Reddish areas appear in photos.
Colors are unnatural
• Manual focus selected: if AF-S or AF-I lens is attached,
choose autofocus mode. Otherwise focus manually.
• Camera unable to focus using autofocus: use manual
focus or focus lock.
• Lens is not AF-S or AF-I: use manual focus.
• Mode dial rotated to
• AF-assist lamp does not light for manual focus or
continuous-servo autofocus. Choose AF-S.
• Choose On for Custom Setting 9 (AF-assist).
• Illuminator has turned off automatically. Illuminator
may become hot with continued use; wait for lamp
to cool down.
• Memory card is full, locked, or not inserted.
• Flash is charging.
• Camera is not in focus.
• CPU lens with aperture ring attached without lock-
ing aperture at highest f/-number.
• Non-CPU lens is attached: rotate camera mode dial
to M.
• Mode dial rotated to S after shutter speed of bulb
selected in mode M: choose new shutter speed.
• Replace battery in remote control.
• Choose remote control mode.
• Flash is charging.
button is • Time selected for Custom Setting 17 (Remote on
duration) has passed: reselect remote control
mode.
• Bright light is interfering with remote.
Continuous shooting is not available when flash is
raised.
Turn noise reduction off.
Set camera clock.
Viewfinder horizontal and vertical frame coverage is
approximately 95%.
pixels • Lower ISO sensitivity or use noise reduction.
• Shutter speed is slower than 1s: use noise reduction.
Reddish areas may appear in long time-exposures.
Turn noise reduction on when shooting at shutter
speeds of "bulb" or "--".
• Select mode P, S, A, or M and adjust white balance to
match light source.
• Select mode P, S, A, or M and adjust Optimize image
settings.
Solution
or : select another mode.
Technical Notes/Troubleshooting 109
28, 97
26, 28
28, 97
4, 18–19
23
76
—
12, 13,
15
17
23
8, 39
39, 43,
45
41, 43
103
33
17
79
—
32, 34,
36
73
11
—
37, 73
73
44, 73
39, 49
39, 68