HP Photosmart C4580 All-in-One Printer - Manual (Page 194)

1 Power connection
2 Power cord and adaptor
3 Power outlet
2. Make sure the product is turned on.
3. If the product is not receiving electrical power, connect it to another power outlet.
4. Turn off the product and reset it by disconnecting the power cord.
5. Wait 5 seconds, and plug in the power cord.
6. Turn on the product.
7. Try to scan again.
To check the USB connection
1. Verify that the USB cable is securely plugged into the USB port on the back of
the product.
2. Make sure the other end of the USB cable is plugged into a USB port on your
computer.
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