HP Deskjet F4100 Guide D'utilisation page 15

c. Plug the power cord back into the HP All-in-One.
d. Turn on the HP All-in-One by pressing the On button.
3. Have the following information available:
a. Specific name of the HP All-in-One, as it appears on the control panel.
b. Print a self-test report. (For more information, see the User Guide.)
c. Be prepared to describe your problem in detail.
d. Have your serial number and service ID ready, found on the self-test report.
e. Be near the HP All-in-One printer when you call HP Support.
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