HP DeskJet 4300 series blank pages: manually clean the cartridges

With the printer on, open the front door and then the inner cartridge-access door. Let the carriage move into reach and stop. To release a cartridge, place two fingers on top and pull it towards you and slightly down until it clicks out.

Remove the black cartridge if only black is missing, the tri-colour cartridge if colour is missing, or both for blank pages affecting both. The full demonstration removes both; the two supporting videos show each cartridge separately.

Find the small printhead area at the bottom of the cartridge, where ink comes out. Dampen kitchen paper with water; the presenter suggests it may be slightly warm. Dab the printhead against it and examine the marks. For black ink, look for a solid black line. For the tri-colour cartridge, look for three distinct, consistent colours.

Continue dabbing to remove dried ink from that area. The video also shows lifting the paper to wipe the printhead directly and using a firmer dab where needed. Keep the work over the paper so ink does not reach your table or clothes.

For a cartridge that still does not leave consistent marks, the presenter recommends a shallow soak. Put just enough water in a small plastic container to cover the printhead at the base. Keep the rest of the cartridge, especially the electrical contacts, above the water.

In the full blank-page video, the suggested soak is about 5–10 minutes. The black-only and colour-only videos describe the same shallow-water option without giving a duration. This is an optional recommendation; the full video achieves its shown ink marks by dabbing.

After dabbing or soaking, use dry kitchen paper to dab off the water. Check that the cartridges are dry before returning them to the printer.

Keep each cartridge’s sticker facing up. Put tri-colour in the left slot and black in the right slot. Slide each loosely into position, use a finger on top for leverage, and push with your thumb until it clicks into place. Close the cartridge-access door.

If the printer is already connected in the HP app, open Print Quality Tools, then View All Print Quality Tools. Let that screen load and scroll to Cartridge Cleaning. Start with the first cleaning level and inspect its progress report. The presenter recommends proceeding to the next level only if the first has not improved the missing ink.

This final app step complements the manual procedure. If your app is not set up, you can still check the result of the manual cleaning by printing your usual document.

Print a page containing the black text or colours that were missing. Consistent marks on kitchen paper are a useful cleaning check, but the printed page is the result that matters. Compare it with the page you printed before cleaning.

If the same areas remain blank after the cleaning and app steps, the presenter’s next recommendation is replacing the affected cartridge. Match the cartridge to your exact printer and region; this guide does not supply a universal ink number.