Brother · Laser · Brother TN223 / TN227 toner

Does third-party ink still work in the Brother MFC-L3750CDW?

Third-party status

Disputed

Disputed: Brother denies blocking; some owners report rejections

This is the printer at the center of the 2025 Brother row: an owner said firmware W1.56 broke color registration with third-party toner. Brother denies blocking anything. Disputed.

What to do now

  • Hold off on firmware updates until reports on the new version appear. Ars suggests keeping control of updates.[1]Brother recommends updating. We have not verified an auto-update off switch on this model.

Workarounds and what does not work

What to buy instead

  • Genuine Brother TN223 / TN227. Always accepted.
  • Compatible TN227 from a seller with a firmware return policy. Ask what happens if an update rejects it.

Shop links

Account required
No
Cartridges
Brother TN223 / TN227 toner
Blocking firmware
None reported
Last checked

Also applies to: HL-L3270CDW, HL-L3210CW, HL-L3230CDW, HL-L3290CDW, MFC-L3710CW and MFC-L3770CDW (same TN223/TN227 toner per Brother).

Third-party and remanufactured cartridges

Brother account and subscriptions

Firmware that blocked cartridges

To see your version, print a printer status report or open the printer's web page. Compare it with the firmware list.

Workarounds that sources back up

What does not reliably work

What to buy instead

  • Genuine Brother TN223 / TN227. Always accepted. Shop
  • Compatible TN227 from a seller with a firmware return policy. Ask what happens if an update rejects it. Shop

These are plain store links. We earn nothing from them today. Disclosure.

What we could not verify

  • Whether firmware W1.56 really caused the color registration fault, or something else did.
  • Any 2026 report for this model.
  • An on-printer setting to stop automatic firmware updates.

Know something we missed? Dated sources beat opinions. Corrections go on the page with a date.

Get an email when the Brother MFC-L3750CDW's status changes

One short email when a firmware update blocks cartridges, or a block gets lifted. No spam, no daily digest.

The email list is not live yet. Nothing you type here is sent anywhere.

Sources

  1. Ars Technica: Brother denies using firmware updates to brick printers with third-party ink (published Mar 5, 2025)
  2. The Register: Brother denies dirty toner tricks (updated Mar 7 and 11) (published Mar 6, 2025)
  3. Brother USA support: Toner Error (read Oct 21, 2026)
  4. Consumer Rights Wiki: Brother printers causing issues with third-party inks (read Oct 21, 2026)
  5. Tom's Hardware: Brother accused of locking down third-party cartridges via firmware updates (published Mar 4, 2025)
  6. Brother USA: TN227BK toner (compatible models) (read Oct 21, 2026)