HP LaserJet Pro 400 Service Manual - Page 188
Device error, press OK, Device is busy. Try again later, Document feeder door is open.
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Recommended action To ensure optimal print quality, HP recommends replacing the toner cartridge at this point. You can continue printing until you notice a decrease in print quality. Actual cartridge life may vary. Once an HP supply has reached very low, HP's premium Protection Warranty on that supply has ended. All print defects or cartridge failures incurred when an HP supply is used in continue at very low mode will not be considered to be defects in materials or workmanship in the supply under the HP Print Cartridge Warranty Statement. Device error, press OK Description Generic engine error. Recommended action This is a warning message only. Job output might be affected. Device is busy. Try again later Description The product is currently in use. Recommended action Wait for the product to finish the current job, or to finish initializing. Document feeder door is open. Description The document feeder cover is open, or a sensor is malfunctioning. Recommended action Make sure that the document feeder cover is closed. If the message persists, turn off the power by using the power switch, wait at least 30 seconds, and then turn on the power and wait for the product to initialize. If the error persists, contact HP. See www.hp.com/go/LJColorMFPM375 or www.hp.com/go/ LJColorMFPM475 or the support flyer that came in the product box. Document feeder jam. Clear and reload. Description A piece of paper is jammed in the document feeder tray. Recommended action Clear the jam. 162 Chapter 2 Solve problems ENWW