HP LaserJet Pro 400 Service Manual - Page 222

Color image defects This section describes issues that can occur when you print in color. Problem Only black is printing when the document should be printing in color. One or more colors are not printing, or are inaccurate. A color is printing inconsistently after you load a new toner cartridge. Cause Solution Color mode is not selected in your program or printer driver. Select color mode instead of gray scale mode. The correct printer driver might not be selected in the program. Select the correct printer driver. The device might not be correctly configured. Print a configuration page to check whether color displays on the configuration page. The color supply is out and the Color Supply Out menu setting is set to Continue Black. Replace the color supply. Sealing tape might be on the toner cartridges. Verify that the sealing tape has been completely removed from the toner cartridges. The media might not meet HP specifications. Use a different paper, such as highquality paper that is intended for color laser printers. The device might be operating in excessively humid conditions. Verify that the device environment is within humidity specifications. One or more toner cartridges might be defective. Replace any low toner cartridges. The product is set to override the Replace [color] message and to continue printing. Replace any low toner cartridges. One or more of the cartridges might not have been engaged properly by the print engine. Remove and reinstall the cartridges. Another toner cartridge might be defective. Remove the toner cartridge for the color that is printing inconsistently and reinstall it. The product is set to override the Replace [color] message and to continue printing. Replace any low toner cartridges. 196 Chapter 2 Solve problems ENWW