Canon EOS 60D Instruction Manual page 284

Troubleshooting Guide
The access lamp still blinks even when the power switch is set to <2>.
If the power is turned off while an image is being recorded to the card,
the access lamp will still continue to light/blink for a few seconds.
When the image recording is completed, the power will turn off
automatically.
The battery becomes exhausted quickly.
Use a fully-charged battery pack (p.24).
The battery performance might have degraded. See the [7 Battery
info.] menu option to check the battery's performance level (p.268). If
the battery performance is poor, replace the battery pack with a new
one.
If you keep displaying the Quick Control screen (p.44) or do Live View
shooting or movie shooting (p.151, 171) for a prolonged period, the
number of possible shots will decrease.
The camera turns off by itself.
Auto power off is in effect. If you do not want auto power off to take
effect, set [5 Auto power off] to [Off].
Shooting-Related Problems
No images can be shot nor recorded.
The card is not properly inserted (p.32).
If the card is full, replace the card or delete unnecessary images to
make room (p.32, 215).
If you try to focus in the One-Shot AF mode while the focus
confirmation light <o> in the viewfinder blinks, a picture cannot be
taken. Press the shutter button halfway again to focus, or focus
manually (p.40, 80).
Slide the card's write-protect switch to the Write/Erase setting (p.32).
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