For the following:
HP 312X CF380X High Yield Black Toner cartridge 4.4K page yield at 5% coverage
HP CF381A Blue Toner cartridge 2.7K page yield at 5% coverage
HP CF382A Yellow Toner cartridge 2.7K page yield at 5% coverage
HP CF383A Red Toner cartridge 2.7K page yield at 5% coverage
HP Colour LaserJet Pro MFP M476dn Colour LaserJet Pro MFP M476dw Colour LaserJet Pro MFP M476nw Laser Printer

Your Toner cartridge will shut down at every cycle of 4.4K printed pages, leaving you unable to print, even though there may be plenty of toner left in the cartridge.
Slash printing costs by simply replacing the chips which shut the cartridges down, to extend Toner cartridge life by up to 30-40%, or use the chip if you are refilling the cartridges, to get them working again.
Each chip lasts for one cycle of 4.4K printed pages, after which it must be replaced.