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| The media might not meet HP specifications.
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| The print cartridge might be defective. If you use a non-HP print cartridge, no messages appear on the product control panel or in HP ToolboxFX.
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| If the print cartridge is not low or empty, inspect the toner roller to see if the roller is damaged. If it is, replace the print cartridge.
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| If the whole page is light, the print density adjustment is too light or EconoMode might be turned on.
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| Adjust the print density, and disable EconoMode in the product Properties.
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| The media might not meet HP specifications.
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| The paper path might need cleaning.
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| A single sheet of print media might be defective.
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| The moisture content of the paper is uneven or the paper has moist spots on its surface.
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| Try different paper, such as high-quality paper that is intended for laser printers. See Paper and print media.
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| The paper lot is flawed. The manufacturing processes can cause some areas to reject toner.
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| The print cartridge might be defective.
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| Vertical streaks or bands appear on the page.
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| The print cartridge might be defective. If you are using a non-HP print cartridge, no messages appear on the product control panel or in the HP ToolboxFX.
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| The amount of background toner shading becomes unacceptable.
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| The media might not meet HP specifications.
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| The single-sheet priority input tray might be installed incorrectly.
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| Make sure that the single-sheet priority input tray is in place.
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| The print-density setting is too high.
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| Decrease the print-density setting throughHP ToolboxFX or the embedded Web server. This decreases the amount of background shading.
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| Very dry (low humidity) conditions can increase the amount of background shading.
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| Check the product environment.
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| The print cartridge might be defective. If you are using a non-HP print cartridge, no messages appear on the product control panel or in the HP ToolboxFX.
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| Toner smears appear on the media.
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| The media might not meet HP specifications.
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| If toner smears appear on the leading edge of the paper, the media guides are dirty, or debris has accumulated in the print path.
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| The print cartridge might be defective. If you are using a non-HP print cartridge, no messages appear on the product control panel or in the HP ToolboxFX.
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| The fuser temperature might be too low.
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| In the printer driver, make sure the appropriate media type is selected.
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| Use the archive print feature to improve toner fusing. See Archive print.
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| The toner smears easily when touched.
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| The product is not set to print on the type of media on which you want to print.
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| In the printer driver, select the Paper/Quality tab and set Paper Type to match the type of media on which you are printing. Print speed might be slower if you are using heavy paper.
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| The media might not meet HP specifications.
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| The paper path might need cleaning.
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| The power source might be defective.
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| Plug the product directly into an AC outlet instead of into a power strip.
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| The fuser temperature might be too low.
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| Use the archive print feature to improve toner fusing. See Archive print.
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| Marks repeatedly appear at even intervals on the page.
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| The product is not set to print on the type of media on which you want to print.
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| In the printer driver, make sure that the appropriate media type is selected. Print speed might be slower if you are using heavy paper.
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| Internal parts might have toner on them.
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| The problem typically corrects itself after a few more pages.
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| The paper path might need cleaning.
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| The print cartridge might be damaged.
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| If a repetitive mark occurs at the same spot on the page, install a new HP print cartridge. See Print cartridge.
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| The printed page contains misformed characters.
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| The media might not meet HP specifications.
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| Use a different paper, such as high-quality paper that is intended for laser printers. See Paper and print media.
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| If characters are incorrectly formed so that they produce a wavy effect, the laser scanner might need service.
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| Verify that the problem also occurs on the configuration page. If so, contact HP. See www.hp.com/support/LJM2727 or the support flyer that came in the product box.
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| The printed page is curled or wavy.
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| The product is not set to print on the type of media on which you want to print.
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| In the printer driver, make sure the appropriate media type is selected.
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| If the problem persists, select a media type that uses a lower fuser temperature, such as transparencies or light media.
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| The media might have been in the input tray too long.
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| Turn over the stack of media in the tray. Also, try rotating the media 180° in the input tray.
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| The paper path is curling the media.
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| Open the rear output door to print to the straight-through output path.
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| The media might not meet HP specifications.
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| Use a different paper, such as high-quality paper that is intended for laser printers. See Paper and print media.
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| Both high temperature and humidity can cause paper curl.
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| Check the product environment.
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| Text or graphics are skewed on the printed page.
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| The media might be loaded incorrectly or the input tray might be too full.
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| Verify that the media is loaded correctly and that the media guides are not too tight or too loose against the stack. See Load paper and print media.
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| The media might not meet HP specifications.
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| Use a different paper, such as high-quality paper that is intended for laser printers. See Paper and print media.
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| The printed page contains wrinkles or creases.
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| The media might be loaded incorrectly or the input tray might be too full.
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| Turn over the stack of paper in the input tray, or try rotating the paper 180° in the input tray.
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| Verify that the media is loaded correctly and that the media guides are not too tight or too loose against the stack. See Load paper and print media.
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| The media might not meet HP specifications.
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| Use a different paper, such as high-quality paper that is intended for laser printers. See Paper and print media.
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| The paper path is curling the media.
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| Open the rear output door to print to the straight-through output path.
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| Air pockets inside envelopes can cause them to wrinkle.
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| Remove the envelope, flatten it, and try printing again.
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| Toner appears around the printed characters.
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| The media might be loaded incorrectly.
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| Turn over the stack of paper in the tray.
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| If large amounts of toner have scattered around the characters, the paper might have high resistivity.
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| Use a different paper, such as high-quality paper that is intended for laser printers. See Paper and print media.
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| An image that appears at the top of the page (in solid black) repeats farther down the page (in a gray field).
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| Software settings might affect image printing.
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| In your software program, change the tone (darkness) of the field in which the repeated image appears.
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| In your software program, rotate the whole page 180° to print the lighter image first.
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| The order of images printed might affect printing.
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| Change the order in which the images are printed. For example, have the lighter image at the top of the page, and the darker image farther down the page.
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| A power surge might have affected the product.
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| If the defect occurs later in a print job, turn the product off for 10 minutes, and then turn on the product to restart the print job.
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