HP Printer Not Printing Black? 8 Causes and Fixes

Your HP printer prints colours but no black — or prints black pages so faint they are barely readable. This specific fault almost always lives in one place: the black ink supply or the printhead nozzles that lay it down. Here is how to track it down and fix it, step by step.

1. Confirm the black cartridge actually has ink

Check the estimated ink levels in the HP Smart app, the printer’s screen, or the HP software on your computer. Cartridges can also dry out or fail before the level shows empty, especially if the printer sat unused for months. If the black cartridge is old, very light, or has been refilled many times, swapping in a fresh one is the fastest test — if black returns, the cartridge was the problem.

2. Check for the protective tape on a new cartridge

Just installed a new black cartridge and nothing prints? Almost every new cartridge has a plastic vent tape on top that must be removed before installation. Take the cartridge out and check: if the tape (usually a bright colour with a pull tab) is still covering the vent, peel it off and reinstall. Also confirm the cartridge clicked firmly into its slot.

3. Print a Print Quality Diagnostic page

From the printer’s screen (Settings → Tools or Printer Maintenance → Print Quality Report) or from HP Smart, print the quality diagnostic page. Look at the black block specifically: if it is missing, streaked, or patchy while colours look fine, the black nozzles are clogged. If the black block is perfect on this page, the printer is fine and the issue is a setting in your document or app — see step 6.

4. Run the printhead cleaning cycle — up to three levels

In HP Smart or the printer’s Maintenance menu, run Clean Printhead. Print another diagnostic page. HP’s cleaning has multiple levels: if level one improves things only partly, run the next level. Stop once black looks solid — every cycle uses ink, and running deep cleans repeatedly when the cartridge is actually empty or faulty just wastes the colour ink too.

5. Align the printhead

After cleaning, run Align Printhead from the same Maintenance menu. Misalignment makes black text look fuzzy, grey, or doubled, and users often describe it as “not printing black properly”. Alignment takes a couple of minutes and the printer will print an alignment page as part of the process.

6. Check the print settings: grayscale and “black only” traps

Software settings can fake this fault. In the print dialog: if “Print in Grayscale” is set to “Black Ink Only”, some HP models refuse or produce washed-out output when the black cartridge has a problem; setting grayscale to “Off” and letting the printer use its normal mix can restore readable text. Also confirm the paper type setting matches the paper loaded — photo paper settings use ink differently and can make black look weak on plain paper. For wider HP printing faults, see HP Printer Not Printing? 10 Fixes.

7. Clean the cartridge contacts (carefully)

If the printer intermittently fails to recognise the black cartridge, remove it and gently wipe the copper-coloured contacts with a dry, lint-free cloth. Do not touch the nozzles on the printhead itself. Reseat the cartridge firmly until it clicks.

8. Try a different document and app

Print a plain black-text page from a simple app (Notepad or TextEdit). If black prints there but not from your original app, the original document or app settings are at fault — check its colour/grayscale options rather than the printer.

When the printhead itself has failed

If a fresh, genuine black cartridge is installed, three cleaning levels change nothing, and the diagnostic page still shows no black, the printhead’s black channel has likely failed. On models with a removable printhead, a replacement may be economical; on printers with a fixed printhead, repair costs often approach the price of a new printer — worth checking your warranty status first. Our general guide covers the remaining computer-side causes: Printer Not Printing? How to Fix It.

The short version

Check the black cartridge’s ink → remove any vent tape → print a quality diagnostic page → clean the printhead (up to three levels) → align → check grayscale/paper settings → clean cartridge contacts → test from a simple app. In most homes, a clogged black nozzle or a dead cartridge is the whole story.