HP Color Inkjet cp1160 Printer series - Manual (Page 122)

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printing a diagnostic page
Follow these steps to print a Diagnostic Page:
from the printer driver
1. Open the Toolbox .
2. Click Print a Diagnostic Page .
The page prints.
or from the printer
1. Press and hold down the Power button.
2. While holding down the Power button, press the Cancel button once.
3. Release the Power button.
The page prints.