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HP Color LaserJet 2840 User Manual

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    							ProblemCauseSolution
    More than one sheet feeds at
    one time.The media tray might be
    overloaded.Remove some of the media
    from the tray. See 
    Loading trays.
    The media might be wrinkled,
    folded, or damaged.Verify that the media is not
    wrinkled, folded, or damaged.
    Try printing on media from a
    new or different package.
    Device does not pull media
    from the media input tray.The device might be in manual
    feed mode.●If Manual feed appears on
    the device control-panel
    display, press E
    NTER to
    print the job.
    ●Verify that the device is not
    in manual feed mode and
    print your job again.
    The pickup roller might be dirty
    or damaged.Contact HP  Customer Care.
    See 
    Service and support or the
    support flyer that came in the
    device box.
    The paper-length adjustment
    control in tray 2 (HP Color
    LaserJet 2840 all-in-one only)
    is set at a length that is greater
    than the media size.Adjust the paper-length
    adjustment control to the
    correct length.
    Performance problems
    Try the tips in this section if pages exit the device, but have nothing printed on them, or
    when the device does not print any pages.
    ProblemCauseSolution
    Pages print but are totally blank.The sealing tape might still be
    in the print cartridges.Verify that the sealing tape has
    been completely removed from
    the print cartridges.
    The document might contain
    blank pages.Check the document that you
    are printing to see if content
    appears on all of the pages.
    The device might be
    malfunctioning.To check the device, print a
    Configuration page. See
    Configuration page.
    Pages print very slowly.Printing in color can slow the
    print job.If you do not need color for
    your print job, set the driver to
    print in grayscale. See 
    Printing
    in grayscale.
    Certain media types can slow
    the print job.Print on a different type of
    media.
    ENWWPrint problems245
     
    						
    							ProblemCauseSolution
    Pages did not print.The device might not be pulling
    media correctly.See Media-handling problems.
    The media is jamming in the
    device.Clear the jam. See Clearing
    jams.
    The USB cable might be
    defective or incorrectly
    connected. ●Disconnect the USB cable
    at both ends and
    reconnect it.
    ●Try printing a job that has
    printed in the past.
    ●Try using a different USB
    cable.
    Other devices are running on
    your computer.The device might not share a
    USB port. If you have an
    external hard drive or network
    switchbox that is connected to
    the same port as the device,
    the other device might be
    interfering. To connect and use
    the device, you must
    disconnect the other device or
    you must use two USB ports on
    the computer.
    246Chapter 14 Troubleshooting ENWW
     
    						
    							Scan problems
    This section helps you identify and resolve scanning problems.
    Solving scanned image problems
    Use the table below to solve image-scan issues.
    ProblemCauseSolution
    The scanned image is of poor
    quality.The original might be a second-
    generation photo or picture.●To eliminate the patterns,
    try reducing the size of the
    image after scanning.
    ●Print the scanned image to
    see if the quality is better.
    ●Verify that your resolution
    and color settings are
    correct for the type of scan
    job that you are
    performing. See 
    Scanner
    resolution and color.
    ●For best results, use the
    flatbed scanner for
    scanning rather than the
    automatic document
    feeder (ADF).
    The image that appears on the
    screen might not be an
    accurate representation of the
    quality of the scan.●Try adjusting your
    computer monitor settings
    to use more colors (or
    levels of gray). Typically,
    you make this adjustment
    by opening Display in
    Windows Control Panel.
    ●Try adjusting the resolution
    and color settings in the
    scanner software. See
    Scanner resolution and
    color.
    The original might have been
    loaded incorrectly.Use the media guides when
    you load the originals into the
    ADF. See 
    To load originals into
    the automatic document feeder
    (ADF).
    The scanner might be dirty.Clean the scanner. See To
    clean the scanner glass.
    The graphics settings might not
    be suitable for the type of scan
    job that you are performing.Try changing the graphics
    settings. See 
    Scanner
    resolution and color.
    ENWWScan problems247
     
    						
    							ProblemCauseSolution
    Part of the image did not scan.The original might have been
    loaded incorrectly.Use the media guides when
    you load the originals into the
    ADF. See 
    To load originals into
    the automatic document feeder
    (ADF).
    A colored background might be
    causing images in the
    foreground to blend into the
    background.Try adjusting the settings
    before you scan the original or
    enhancing the image after you
    scan the original. See 
    Scanner
    resolution and color.
    The original is longer than 381
    mm (15 inches).The maximum scannable
    length is 381 mm (15 inches)
    when you use the automatic
    document feeder (ADF) input
    tray. If the page exceeds the
    maximum length, the scanner
    stops. (Copies can be longer.)
    CAUTION
    Do not try to pull the original
    from the ADF; you might
    damage the scanner or your
    original. See 
    Media jams occur
    in the automatic document
    feeder (ADF).
    The original is too small.The minimum size that the
    flatbed scanner supports is 25
    by 25 mm (1 by 1 inches). The
    minimum size that the ADF
    supports is 127 by 127 mm (5
    by 5 inches). The original might
    be jammed. See 
    Media jams
    occur in the automatic
    document feeder (ADF).
    The media size is incorrect.In Scan settings, make sure
    that the input media size is
    large enough for the document
    that you are scanning. See
    Scanner resolution and color.
    248Chapter 14 Troubleshooting ENWW
     
    						
    							ProblemCauseSolution
    The scan takes too longThe resolution or color level is
    set too high.Change the resolution and
    color level settings to the
    correct settings for your job.
    See 
    Scanner resolution and
    color.
    The software is set to scan in
    color.The system default is color,
    which takes longer to scan
    even when scanning a
    monochrome original. If you
    acquire an image through
    TWAIN or WIA, you can
    change the settings so that the
    original scans in grayscale or
    black-and-white. See the
    device software Help for details.
    A print job or copy job was sent
    before you tried to scan.If someone sent a print job or
    copy job before you tried to
    scan, the scan will start if the
    scanner is not busy. However,
    because the printer and
    scanner share memory, the
    scan might be slower.
    Scan quality problems
    This section provides information about improving scan quality by preventing or correcting
    problems.
    Preventing problems
    The following are a few simple steps you can take to improve copy and scan quality.
    ●Use the flatbed scanner, rather than the automatic document feeder (ADF) input tray, to
    scan.
    ●Use high-quality originals.
    ●Load the media correctly. If the media is loaded incorrectly, it might skew, which causes
    unclear images. See 
    Loading trays for instructions.
    ●Adjust the software settings according to how you plan to use the scanned page. See
    Scanner resolution and color for more information.
    ●If your device frequently feeds more than one page at a time, the separation pad might
    need to be replaced. Contact HP Customer Care. See 
    Service and support or the flyer
    that came in the printer box.
    ●Use or make a carrier sheet to protect your originals.
    ENWWScan problems249
     
    						
    							Solving scan-quality problems
    ProblemCauseSolution
    Blank pagesThe original might have been
    loaded upside down.In the automatic document
    feeder (ADF), put the top end
    of the stack of originals into the
    ADF input tray, with the media
    stack face-up and the first page
    to be scanned on top of the
    stack.
    On the flatbed scanner, place
    the original document face-
    down with the upper-left corner
    of the document at the lower-
    right corner of the glass.
    Too light or darkThe resolution and color levels
    may be set incorrectly.Verify that you have the correct
    resolution and color settings.
    See 
    Scanner resolution and
    color.
    Unwanted linesInk, glue, correction fluid, or an
    unwanted substance might be
    on the glass.Clean the flatbed scanner
    surface. See 
    To clean the
    scanner glass.
    The ADF glass might be dirty.Clean the ADF glass. See To
    clean the scanner glass.
    Black dots or streaksInk, glue, correction fluid, or an
    unwanted substance might be
    on the glass.Clean the flatbed scanner
    surface. See 
    To clean the
    scanner glass.
    Unclear textThe resolution and color levels
    may be set incorrectly.Verify that you have the correct
    resolution and color settings.
    See 
    Scanner resolution and
    color.
    250Chapter 14 Troubleshooting ENWW
     
    						
    							Copy problems
    This section helps you identify and resolve copying problems.
    Preventing problems
    The following are a few simple steps you can take to improve copy quality:
    ●Copy from the flatbed scanner. This will produce a higher quality copy than copying from
    the automatic document feeder (ADF).
    ●Use quality originals.
    ●Load the media correctly. If the media is loaded incorrectly, it might skew, causing
    unclear images and problems with the OCR application. See 
    Loading documents to
    scan for instructions.
    ●Use or make a carrier sheet to protect your originals.
    Note
    Verify that the media meets HP specifications. If the media meets HP specifications,
    recurring feed problems indicate the copier/separation pad is worn. Contact HP Customer
    Care. See 
    Service and support or the flyer that came in the printer box.
    Image problems
    ProblemCauseSolution
    Images are missing or faded.One or more print cartridges
    might be low.Replace any low print
    cartridges. See 
    Changing a
    print cartridge.
    The original might be of poor
    quality.If your original is too light or
    damaged, the copy might not
    be able to compensate, even if
    you adjust the contrast. If
    possible, find an original
    document in better condition.
    The original might have a
    colored background.Colored backgrounds might
    cause images in the foreground
    to blend into the background,
    or the background might
    appear in a different shade. If
    possible, use an original
    document without a colored
    background.
    ENWWCopy problems251
     
    						
    							ProblemCauseSolution
    Vertical white or faded stripes
    appear on the copy.The media might not meet
    HP specifications.Use media that meets
    HP specifications. See 
    Media
    specifications.
    One or more print cartridges
    might be low.Replace any low print
    cartridges. See 
    Changing a
    print cartridge.
    Unwanted lines appear on the
    copy.Tray 1 might not be placed
    correctly.Verify that tray 1 is in place.
    The flatbed scanner or the ADF
    glass might be dirty.Clean the flatbed scanner or
    the ADF glass. See 
    To clean
    the scanner glass.
    The photosensitive drum inside
    the print cartridge might have
    been scratched.Install a new HP print cartridge.
    See 
    Changing a print cartridge.
    Black dots or streaks appear
    on the copy.Ink, glue, correction fluid, or an
    unwanted substance might be
    on the automatic document
    feeder (ADF) or flatbed scanner.Clean the device. See Cleaning
    the device.
    Copies are too light or dark.The printer driver or device
    software settings may be
    incorrect.Verify that the quality settings
    are correct. See 
    Adjusting the
    copy quality.
    See the device software Help
    for more information about
    changing the settings.
    Text is unclear.The printer driver or device
    software settings may be
    incorrect.Verify that the quality settings
    are correct. See 
    Adjusting the
    copy quality.
    See the device software Help
    for more information about
    changing the settings.
    Media-handling problems
    ProblemCauseSolution
    Poor print quality or toner
    adhesionThe paper is too moist, too
    rough, too heavy or too
    smooth, or it is embossed or
    from a faulty paper lot.Try another kind of paper,
    between 100 and 250
    Sheffield, 4 to 6% moisture
    content.
    252Chapter 14 Troubleshooting ENWW
     
    						
    							ProblemCauseSolution
    Dropouts, jamming, or curlThe paper has been stored
    incorrectly.Store paper flat in its moisture-
    proof wrapping.
    The paper has variability from
    one side to the other.Turn the paper over.
    Excessive curlThe paper is too moist, has the
    wrong grain direction, or is of
    short-grain constructionOpen the rear output bin, or
    use long-grain paper.
    The paper varies from side-to-
    side.Turn the paper over.
    Jamming, damage to deviceThe paper has cutouts or
    perforations.Use paper that is free of
    cutouts or perforations.
    Problems with feedingThe paper has ragged edges.Use high-quality paper that is
    made for color laser printers.
    The paper varies from side-to-
    side.Turn the paper over.
    The paper is too moist, too
    rough, too heavy or too
    smooth, has the wrong grain
    direction, or is of short-grain
    construction or it is embossed
    or from a faulty paper lot.Try another kind of paper,
    between 100 and 250
    Sheffield, 4 to 6% moisture
    content.
    Open the rear output bin, or
    use long-grain paper.
    Print is skewed (crooked).The media guides might be
    incorrectly adjusted.Remove all media from the
    input tray, straighten the stack,
    and then load the media in the
    input tray again. Adjust the
    media guides to the width and
    length of the media that you
    are using and try printing again.
    More than one sheet feeds at
    one time.The media tray might be
    overloaded.Remove some of the media
    from the tray. See 
    Loading trays.
    The media might be wrinkled,
    folded, or damaged.Verify that the media is not
    wrinkled, folded, or damaged.
    Try printing on media from a
    new or different package.
    ENWWCopy problems253
     
    						
    							ProblemCauseSolution
    Device does not pull media
    from the media input tray.The device might be in manual
    feed mode.●If Manual feed appears on
    the device control-panel
    display, press E
    NTER to
    print the job.
    ●Verify that the device is not
    in manual feed mode and
    print your job again.
    The pickup roller might be dirty
    or damaged.Contact HP  Customer Care.
    See 
    Service and support or the
    support flyer that came in the
    device box.
    The paper-length adjustment
    control in tray 2 (HP Color
    LaserJet 2840 all-in-one only)
    is set at a length that is greater
    than the media size.Adjust the paper-length
    adjustment control to the
    correct length.
    Performance problems
    ProblemCauseSolution
    No copy came out.The input tray might be empty.Load media in the device. See
    Loading documents to scan for
    more information.
    The original might have been
    loaded incorrectly.In the automatic document
    feeder (ADF), load the original
    with the narrow side forward
    and the side to be scanned
    facing up.
    On the flatbed scanner, place
    the original document face-
    down with the upper-left corner
    of the document at the lower-
    right corner of the glass.
    254Chapter 14 Troubleshooting ENWW
     
    						
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