Printer Ink & Toner Help Centre

The "cartridge not recognised", "cartridge not detected", "cartridge missing" or "incompatible cartridge" error means the printer cannot read a newly installed or existing cartridge. It happens with both OEM and compatible/remanufactured cartridges.

Step-by-step

1. Check for protective packaging. Remove the cartridge and make sure all tape, plastic strips and pull-tabs are gone — even a small sticker over the nozzle or contacts blocks detection.
2. Clean the electrical contacts. Gently wipe the gold/copper contact pads on the cartridge and inside the carriage with a dry, lint-free cloth. Avoid water or sprays unless using a proper printhead cleaning solution.
3. Re-seat the cartridge. Push firmly into the correct slot until it clicks. Compatible cartridges sometimes need firmer pressure than OEM.
4. Power-cycle the printer. Turn it off, unplug from the wall for at least 60 seconds, then power back on to force a fresh scan.
5. Check for a firmware update. Outdated firmware is a frequent cause of incompatibility with newer or third-party chips. Install any update and restart.
6. Test with a different cartridge. If a known-good OEM cartridge is recognised but the compatible one is not, the issue is chip incompatibility with the firmware.

Prevent it

• Remove all packaging before installing; avoid touching the contact pads.
• Keep firmware up to date and buy compatibles from a supplier that guarantees chip compatibility for your exact printer model.

Related: False low-ink warning · Cartridge won't seat · No ink output

A clogged printhead is dried ink blocking the tiny nozzles. Symptoms include horizontal white lines or gaps, a colour not printing, faint or patchy output, banding, and missing sections in a nozzle-check pattern. It's commonly caused by leaving the printer unused, running a cartridge bone dry, or low-quality ink.

Step-by-step

1. Run the head-cleaning cycle (Maintenance / Tools / Utilities → Head Cleaning). Print a nozzle check after. Don't exceed 2-3 cycles in a row.
2. Print a nozzle check after each cycle to measure progress.
3. Rest overnight. Power off and leave it; residual moisture softens partially dried ink. Clean once more in the morning.
4. Warm-water soak (severe clogs). Remove the cartridge/printhead, rest it face-down on a cloth dampened with warm distilled water for 5-10 minutes, then blot gently.
5. Cleaning-solution soak (stubborn clogs). Apply printhead cleaning solution to the nozzle plate and soak 15-30 minutes; flush gently and dry.
6. Replace the cartridge or printhead if output never fully returns. HP printheads are usually in the cartridge; Epson/Canon/Brother often have a fixed printhead.

Prevent it

• Print at least one page a week; never leave the printer idle for more than 2-3 weeks.
• Always switch off using the printer's power button so the printhead parks sealed.

Related: Faded output · Banding

Faded output means pages print lighter than expected, lack contrast, or show uneven coverage. The cause differs between inkjet and laser, but it's usually user-fixable without a new cartridge.

Step-by-step

1. Rock the toner cartridge (laser). Remove it, hold horizontally and rock side to side 5-6 times to redistribute powder; reinstall and test.
2. Disable eco / toner-save mode. Set quality to Standard or Normal.
3. Increase print density / darkness by one or two increments (avoid maximum, which wastes toner).
4. Verify the paper type setting matches the loaded media.
5. Run a nozzle check and head clean (inkjet) — faded inkjet output is often partially clogged nozzles.
6. Check ink/toner levels and replace only if genuinely low. Consistent fading across all content is a more reliable sign than the level display.
7. Let a cold cartridge warm up to room temperature before printing.

Related: Streaks & banding · Clogged printhead · Fast depletion

Streaks, lines and banding are repeating defects — vertical lines (laser), horizontal light/dark bands (both), thin white gaps, or a single repeating mark at fixed intervals.

Step-by-step

1. Run a head-cleaning cycle (inkjet) 2-3 times with a nozzle check after each.
2. Clean the drum unit (laser). Wipe the green/grey drum surface gently with a dry lint-free cloth, rotating to cover the full circumference.
3. Rock the toner cartridge to redistribute powder.
4. Print a drum/pattern test to isolate the defect: 75-95mm interval = drum; 45-60mm = developer roller / doctor blade in the toner cartridge.
5. Clean the interior paper path — a single piece of debris can streak every page.
6. Replace the toner cartridge or drum unit if cleaning fails. Drum units typically last 3-4 toner cartridges.

Handle drum units carefully — never expose the surface to light for more than a few seconds or touch it with bare hands.

Smearing means ink or toner rubs off or smudges because it hasn't bonded to the paper. Causes differ: inkjet (wrong paper type, ink too dense, dirty rollers, humidity) and laser (wrong paper type, under-heated or worn fuser, loose toner).

Step-by-step

1. Check the paper type setting matches the loaded media — selecting Thick/Cardstock for heavy paper makes the laser fuser apply more heat to bond toner.
2. Run a roller-cleaning cycle (inkjet) with plain A4 until sheets come out clean.
3. Let prints dry 30-60 seconds before handling or stacking.
4. Reduce ink density / saturation (inkjet) by one or two increments.
5. Clean the paper path (laser) with a dry cloth; avoid wet cloths near the fuser.
6. Let the fuser warm up (laser) — first-page-only smearing that clears is normal.
7. Assess the fuser unit on high-page-count printers; replace if worn.

Ghost images are faint duplicate impressions offset below the original, repeating at a fixed interval. It does not occur on inkjet printers.

Diagnose by the gap

• ~75-95mm below original → drum unit
• ~50-70mm → fuser unit
• under 30mm → developer roller / toner cartridge cleaning blade

Step-by-step

1. Check the paper type setting — thin, recycled or damp paper is a common cause.
2. Run a cleaning page from the maintenance menu.
3. Enable ghost reduction (Canon): Adjustment/Maintenance > Special Processing > Reduce Ghosting 1.
4. Replace the toner cartridge if the interval points to it (worn cleaning blade).
5. Replace the drum unit (separate on most Brother/Lexmark) if at or near rated life.
6. Address humidity — move to a drier environment and avoid damp or re-used paper.

A toner leak is loose powder escaping the cartridge into the printer. Signs: black powder inside, dark smudges on pages, powder on hands, or a burning/plastic smell. Common causes are a cracked cartridge, an unseated seal, a badly refilled or overfilled cartridge, or a dropped cartridge.

Step-by-step

1. Stop printing immediately to avoid spreading toner through the paper path and fuser.
2. Power off and unplug; let it cool 10-15 minutes (the fuser is hot).
3. Remove the cartridge carefully, keeping it level; place it on disposable paper or in a sealable bag.
4. Clean with a dry lint-free cloth from the edges inward. No water. No standard vacuum. Use a toner/HEPA anti-static vacuum if available.
5. Inspect and clean the drum unit (if separate) without touching the drum surface.
6. Assess the cartridge — discard and replace if cracked; never tape a cracked cartridge.
7. Run a cleaning page and several test pages after reassembly.

Safety

• Avoid inhaling toner; work ventilated or wear a dust mask.
• Wear gloves and old clothing — toner stains permanently.
• Check local council rules for toner disposal.

Because levels are chip estimates based on page counts, a fresh compatible/remanufactured cartridge can be misread — or the printer's own stale memory misreads a new chip. Some manufacturers also push firmware that rejects non-OEM chips.

Step-by-step

1. Power-cycle the printer (off, unplug 60 seconds, on).
2. Remove and reinstall the cartridge so the chip is re-read on fresh insertion.
3. Use a chip resetter (model-specific) to reset usage data to full.
4. Disable the ink monitor (Canon): hold Stop/Cancel 5-10 seconds.
5. Override the warning (HP): select Yes/Continue on the non-genuine prompt (may repeat after each power cycle).
6. Override via control panel (Brother/Epson/Canon): Settings > Maintenance / Supply Info.
7. Check firmware updates or rollbacks if a recent update introduced the block.

Reliable indicator: replace a cartridge based on a consistent drop in print quality, not the level warning alone.

A cartridge that won't seat can't fully insert, feels loose, or stops the door closing — common after fitting a new (often compatible) cartridge, but also with the wrong OEM model.

Step-by-step

1. Verify the model number against your exact printer (watch 302 vs 302XL vs 303).
2. Remove all packaging — tape, film, pull-tabs, orange clips, toner sealing strips.
3. Check the orientation using the cartridge arrow/label or setup guide.
4. Verify the colour slot on multi-cartridge inkjets.
5. Apply firm, even pressure until it clicks; compatibles often need more force.
6. Inspect the slot for obstruction with a torch; remove debris with tweezers or a cotton swab (no metal tools).
7. Test a known-working cartridge. If nothing seats, the locking mechanism may be damaged and need service.

Yields use ISO/IEC 24711 (inkjet) and ISO/IEC 19752 (laser) tested at ~5% coverage — a light text page. Real pages with graphics or solid colour run 40-80% coverage, using far more ink.

Reduce consumption

1. Use draft / toner-save mode for everyday docs (20-50% less ink).
2. Reduce print density.
3. Batch print jobs — each inkjet job triggers an ink-using cleaning cycle.
4. Print greyscale when colour isn't needed.
5. Match the paper type setting to avoid heavy passes.
6. Audit background cleaning cycles; switch off via the power button rather than standby.
7. Verify fill volume — a compatible that empties far faster than OEM may be underfilled; use a supplier with verified yields.

XL / high-yield cartridges cost ~20-40% more but deliver 2-3x the pages — the best long-term fix for heavy printing.

An OEM cartridge is made by your printer's brand and sold at a premium under the "razor-and-blades" model — printers sold cheap, profit recouped on cartridges (OEM ink margins have been reported above 70%). A compatible cartridge is a brand-new third-party unit built to the same dimensions, chip spec and ink formula, tested to ISO standards. It's different from a remanufactured cartridge, which is a cleaned, refilled used OEM unit.

Quality & value

• ~80% of modern compatibles meet or exceed OEM quality; ~70% of users notice no difference in output.
• Compatibles are often filled with more ink/toner than the OEM equivalent.
• Typical saving of 40-70% vs OEM — a business spending £150/month on OEM toner could drop to £60-90/month.

Warranty (UK)

Under the Competition Act 1998 a manufacturer cannot void your warranty just because a non-branded cartridge was used — they must prove the cartridge directly caused a fault. Reputable suppliers also add their own money-back guarantee.

When OEM still makes sense: professional photography/fine-art colour matching, an extended warranty that explicitly requires OEM, or a printer with firmware that aggressively blocks compatible chips.

Choose a supplier with ISO certification, a chip-compatibility guarantee, model-specific listings, a clear guarantee, and verified reviews. Browse PrinterInks compatible cartridges.

Dispatch cut-off

• Before 4:30pm on a business day → dispatched same day.
• After 4:30pm → next business day; after 4:30pm Friday → Monday.
• UK addresses only.

Remote & non-mainland

A £9.95 surcharge may apply to: AB, BT, DD8-10, FK17-21, GY, HS1-9, IM, IV, JE, KA27-28, KW, PA, PH, PO30-41, TR21-25, ZE1-3 (parts of Scotland, Northern Ireland, Channel Islands, Isle of Man and islands).

Tracking & delays

• A tracking link is emailed at dispatch (often inactive for the first 6-12 hours).
• Standard/Rapid times are guidelines, not guarantees. Allow at least 5 working days before contacting support.
• Missed delivery: a calling card is left; rebook via the tracking page.
• Returned undelivered orders ("not called for"/"refused"/"gone away") may incur a £3.99 admin fee. This does not affect your statutory rights.

How to start a return

Email contactus@printerinks.com with your order number (response aim: 4 business hours). A digital RMA code is issued and must be written visibly on the outside of the package. Most resolutions complete within 48-72 hours of the return arriving.

Faulty compatible & remanufactured cartridges

Quick reference

Refunds go to the original payment method (most banks show within 3-4 business days). Statutory rights under UK Distance Selling Regulations apply in addition to this policy.