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Problem Cause Solution
assembly. See Replacing the memory-
card assembly (HP Color LaserJet
2840 all-in-one only).
You might have inserted more than
one memory card.
Only one card slot can be occupied for
the device to detect JPEG files. Verify
that only one card is inserted.
One or more print cartridges might be
low.
Replace any low print cartridges. See
Replacing the print cartridges.
Proof sheet not printing
Use the table in this section to solve problems with proof-sheet printing.
Problem Cause Solution
The proof sheet will not print. The memory card might have been
removed before the device could print
the page, or the memory card might
have been inserted incorrectly.
Reinsert the card and reprint the proof
sheet.
If the card is correctly inserted, use
another memory card. If more than one
memory type card has the same issue,
verify that the LED lights when a card
inserted. If the LED does not light,
verify that the flat cable from the
formatter is connected correctly to the
memory-card assembly. If the error
persists, replace the memory-card
assembly. See
Replacing the memory-
card assembly (HP Color LaserJet
2840 all-in-one only).
You might have inserted more than
one memory card.
Only one card slot can be occupied for
the device to detect JPEG files. Verify
that only one card is inserted.
One or more print cartridges might be
low.
Replace any low print cartridges. See
Replacing the print cartridges.
Proof sheet not scanning
Use the table in this section to solve problems with proof-sheet scanning.
Problem Cause Solution
The proof sheet will not scan correctly. The flatbed scanner glass might be dirty. Clean the flatbed scanner glass. See
To clean the scanner glass.
The automatic document feeder (ADF)
might be loaded.
Remove any media from the ADF.
The scanner might not be able to read
the photo selections. This feature has
been optimized and tested for use with
Genuine HP Toner Supplies (variations
in color shading can impact the
performance of this feature).
Verify that you have colored the
bubbles darkly enough for the scanner
to read.
292 Chapter 6 Troubleshooting ENWW
304


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