Nikon D3100 2 manual 193

Indicator
Monitor	Viewfinder		Solution	0
This card is not formatted.	T	Format card or turn camera off and insert new		21
Format the card.	(blinks)	memory card.
		•	Reduce quality or size.	64
Card is full	j/A/s￿	•	Delete photographs.	31,
	(blinks)			109
		•	Insert new memory card.	20
—	●	Camera can not focus using autofocus. Change		26,
	(blinks)	composition or focus manually.		56, 62
		•	Use a lower ISO sensitivity.	71
		•	Use commercial ND filter.	—
Subject is too bright.	q	•	In mode:
			S Increase shutter speed	75
			A Choose a smaller aperture (larger f-number)	76
		•	Use a higher ISO sensitivity.	71
		•	Use flash.	67
Subject is too dark.	r	•	In mode:
			S Lower shutter speed	75
			A Choose a larger aperture (smaller f-number)	76
No Bulb in S mode.	A	Change shutter speed or select manual exposure		75, 77
	(blinks)	mode.
		Flash has fired at full power. Check photo in
—		monitor; if underexposed, adjust settings and try		—
	N	again.
Flash is in TTL mode. Choose	(blinks)	Change flash mode setting on optional flash unit		167
another setting or use a CPU		or use CPU lens.
lens.
		•	Use the flash.	67
		•	Change distance to subject, aperture, flash	70,
			range, or ISO sensitivity.	71, 76
		•	Lens focal length is less than 18 mm: use a	—
—	N/s￿		longer focal length.
	(blinks)	•	Optional SB-400 flash unit attached: flash is in	—
			bounce position or focus distance is very short.
			Continue shooting; if necessary, increase focus
			distance to prevent shadows from appearing in
			photograph.
	s￿	Error occurred updating firmware for optional
Flash error		flash unit. Contact Nikon-authorized service		—
	(blinks)
		representative.

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193