HP Photosmart C4680 All-in-One Printer - Manual (Page 87)

Cause: The original was placed incorrectly on the glass.
If this did not solve the issue, try the next solution.
Solution 3: Wipe the glass and the back of the document lid
Solution: Turn off the product, unplug the power cord, and then use a soft cloth to
wipe the glass and the back of the document lid.
Cause: Debris might have been stuck on the glass or on the back of the document
lid. The product interprets anything it detects on the glass as part of the image.
The printout is blank
Solution: Load the original print side down on the right front corner of the glass as
shown below.
Cause: The original was placed incorrectly on the glass.
Scan troubleshooting
Use this section to solve these scan problems:
Chapter 10
84 Solve a problem
Solve a problem