HP LaserJet Pro 400 MFP M425 - Manual (Page 173)

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 toner cartridge
has reached very low, HP's Premium Protection Warranty on that toner cartridge has ended. All print defects
or cartridge failures incurred when an HP toner cartridge is used in Continue at Very Low mode will not be
considered to be defects in materials or workmanship in the toner cartridge under the HP Print Cartridge
Warranty Statement.
Unexpected size in tray <X> Load <size> Press [OK]
Description
The product has detected paper in the tray that does not match the configuration for the tray.
Recommended action
Load the correct paper into the tray, or configure the tray for the size that you have loaded.
Unsupported black cartridge Press [OK] to continue
Description
The product has detected an installed toner cartridge that was not made by HP.
Recommended action
Press the OK button to continue printing.
If you believe you purchased an HP supply, go to www.hp.com/go/anticounterfeit . Service or repairs that are
required as a result of using unsupported supplies are not covered under HP warranty.
Used black cartridge is installed Press [OK] to continue
Description
You are using a toner cartridge that reached the default low threshold while it was installed in a product.
Recommended action
Prining can continue, but consider having a replacement toner cartridge on hand.
ENWW Interpret control panel messages 157