Canon imageclass mf6560 ユーザーズマニュアル

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7-3
Nothing appears in the LCD.
Q
Is the power cord plugged in securely?
A
Unplug the machine and wait for 5 seconds, then 
plug it back in. If the LCD still remains blank, 
contact Canon Customer Care Center.
Q
Is the main power switch turned on?
A
Turn on the main power switch.
Q
Is the machine in Sleep mode?
A
Press [ON/OFF] on the operation panel to cancel 
Sleep mode.