Canon imageFORMULA DR-C225 II User Manual page 20

You can secure the cables to the back of the scanner. Make sure
there is sufficient slack in the cable when doing so to reduce stress
on the connector.
Turning the Power ON
The power of the scanner can be turned ON and OFF with the power
button on the front of the scanner.
1
Make sure that the scanner and computer are connected properly.
2
Press the power button.
The power button lights blue when the power turns ON.
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