Why Is My HP Printer Not Printing Black?
Quick answer
Start with the black toner cartridge: gauges are estimates, so a cartridge reading 20% can be empty — and a new cartridge with its sealing tape in place prints nothing. Swap in a known-good cartridge, then print the config page from the panel. If black is fine there, it's the driver; if not, the black imaging hardware needs service.
On a business laser printer, "not printing black" almost always comes down to the black toner cartridge or the imaging hardware behind it — and there's a quick sequence that tells you which, without guessing.
First: laser or inkjet?
This matters because the fixes are different. If it's an inkjet, missing black is usually a dried or clogged printhead — run the printhead cleaning cycle from the printer's maintenance menu (twice if needed) and print a nozzle-check page. If it's a laser machine — which is what most offices run — cleaning cycles don't apply, and the steps below do.
Work through the black cartridge
- Don't trust the gauge. A cartridge reading 20% can be effectively done — gauges estimate by page count, not by weight. Remove the black cartridge and rock it gently; if black comes back briefly, the cartridge is empty.
- Check the new cartridge basics. Sealing tape removed, drum shutter moving freely, cartridge clicked fully home. On color LaserJets, confirm the black cartridge is in the black slot — mixed-up positions happen after a multi-cartridge change.
- Do the swap test. A known-good black cartridge is the fastest diagnosis in printing. If black returns, done. If not, the printer earned a closer look.
If a good cartridge still prints no black
- Print the config page from the control panel. If its black is fine, the problem is the driver or a color-management setting (check "print grayscale using black only" and any "save toner" modes) — reinstall the full driver for your exact model.
- If the config page is also missing black, the black imaging hardware is at fault: on color models, the black drum/developer station or its high-voltage contacts; on mono models, the laser assembly or transfer roller — the same territory as fully blank pages.
- Faint, patchy black rather than none is a different clue — that's a worn drum or developer, and it will keep fading week by week.
Hardware-level causes on office machines are all part-replacement repairs — the config-page test result is the detail worth mentioning when you book service, because it tells the technician the fault is in the engine, not your computers.
If a known-good black cartridge and a control-panel test page both fail, the black imaging hardware needs service — that's a parts repair on the printer itself, not anything on your computers.