HP LaserJet Pro MFP M26a Supplies

The HP CF279A cartridge has an approximate yield of 1000 pages.

When the LaserJet Pro MFP M26a throws a "Supply Problem" error, the printer often simply can't read the cartridge chip. Give it a full power-cycle, take the cartridge out and put it back securely, and lightly buff the metal contacts with a dry, lint-free cloth. If it persists after all that, the cartridge is likely worn — install HP CF279A.