HP LaserJet Pro 400 color Printer M451 series - Manual (Page 87)

Replacement instructions
Replace the print cartridges
The product uses four colors and has a different print cartridge for each color: black (K), magenta (M),
cyan (C), and yellow (Y).
CAUTION: If toner gets on any clothing, wipe it off with a dry cloth and wash the clothing in cold
water. Hot water sets toner into the fabric.
1. Open the front door.
2. Pull out the print-cartridge drawer.
3. Grasp the handle on the old print cartridge
and then pull the cartridge straight up to
remove it.
ENWW Replacement instructions 69