Nikon N4004s - Manual (Page 10)

CHECKING BATTERY POWER
Exposure indicator LED(s) lights up or
blinks if power is sufficient, and stays
on approx. 8 sec. after you take your
finger off the button.
Lightly press shutter release button
and check viewrfinder exposure indi­
cator LED(s) to make sure battery
power is sufficient.
Battery power can also be
checked by film advance speed,
operation speed of autofocus lens
or flash recycling time. V\/hen
these become noticeably slower,
change batteries.
If LED goes off approx. 2 sec. after finger is removed
from button, batteries need replacement.
No LED, and shutter locks.
Check battery installation
or change batteries.
The microcomputer in the N4004s may turn the camera off, even when
batteries with sufficient power are properly installed. To start or resume
operation, remove batteries and install again.