HP 2840 HP Color LaserJet 2820/2830/2840 All-In-One - User Guide - Page 253
HP Customer Care. See, HP Toolbox. - laser printer
UPC - 829160742731
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Problem Dropouts appear. Vertical streaks or bands appear on the page. Cause Solution A single sheet of print media might be defective. Try reprinting the job. The moisture content of the paper is uneven or the paper has moist spots on its surface. Try different paper, such as high-quality paper that is intended for color laser printers. See Media specifications. The paper lot is flawed. The manufacturing processes can cause some areas to reject toner. Try different paper, such as high-quality paper that is intended for color laser printers. See Media specifications. The imaging drum might be defective. Replace the imaging drum. See Changing the imaging drum. If the error persists, contact HP Customer Care. See Service and support or the support flyer that came in the device box. One or more print cartridges might be low or defective. If you are using non-HP print cartridges, no messages appear on the device control panel or in the HP Toolbox. Replace any low print cartridges. See Changing a print cartridge. The imaging drum might be low. Replace the imaging drum. See Changing the imaging drum. The amount of background toner shading becomes unacceptable. The media might not meet HP specifications. Use a different paper with a lighter basis weight. See Media specifications. Very dry (low humidity) Check the device environment. conditions can increase the amount of background shading. One or more print cartridges might be low. If you are using non-HP print cartridges, no messages appear on the device control panel or in the HP Toolbox. Replace any low print cartridges. See Changing a print cartridge. The imaging drum might be low. Replace the imaging drum. See Changing the imaging drum. ENWW Print problems 237