Canon EOS 5D - Manual (Page 166)

166
If there is a problem, first refer to this Troubleshooting Guide. If this
Troubleshooting Guide does not resolve the problem, contact your
dealer or nearest Canon Service Center.
You are using the wrong battery.
X Do not recharge any battery pack other than Battery Pack BP-
511A, BP-514, BP-511, or BP-512.
The battery is not properly attached to the battery charger.
X Attach the battery properly to the charger. (p.22)
The battery is exhausted.
X Recharge the battery. (p.22)
The battery is not installed properly.
X Install the battery properly. (p.24)
Battery compartment cover is not closed.
X Close the battery compartment cover securely. (p.24)
CF card slot cover is not closed.
X Close the CF card slot cover securely. (p.28)
If you set the <4> switch to <2> right after shooting, the
access lamp will still light/blink for a few seconds while the
image is recorded onto the CF card.
X When the camera finishes recording the image to the CF card, the access
lamp will stop blinking and the power will turn off automatically.
The battery is not fully charged.
X Recharge the battery fully. (p.22)
The battery’s service life has expired.
X Replace the battery with a new one.
Troubleshooting Guide
Power Source
The battery cannot be recharged.
The camera does not operate even when the <4> switch is set to <1> or <J>.
The access lamp blinks even when the <4> switch is set to <2>.
The battery becomes exhausted quickly.