Toner stopped working on a brother 2370DN printer.
Toner stopped working on a brother 2370DN printer.
I own a Brother HL-L2370DN printer where the toner ran out completely. After replacing the cartridge with ink, the printer displayed a toner low message when I restarted it. Several YT guides recommended a toner reset process with specific steps. I followed the TNR-HC option as suggested, but it didn’t help. I also experimented with other options without success. Additional guides recommended a manual reset via user mode: turning off the printer, pressing the ON and Go buttons repeatedly until the user mode appeared on the small LCD, then pressing the GO button nine times until the network light blinked, and finally repeating it five times. Despite these efforts, the toner function remained unresponsive. The toner details are TN2405 and drum number DR-2405. Thank you for your assistance.
How was the toner cartridge refilled? Was there a design intended to allow refilling?
Printer makers typically aim to maximize earnings from ink and toner sales, sometimes even selling printers at a loss.
Currently, the approach of using third-party cartridges (ink or toner), refilling them, switching printers, etc., is often discouraged and possibly built to prevent such actions.
The methods and guides you mentioned may no longer be relevant once they were exposed and shared publicly.
Check the firmware versions installed on the printers—are they the same?
The same applies to the toner cartridges, including the drum—likely identical in appearance but possibly differing slightly.
Also note that even if refilled toners function, the process may have ended up voiding any remaining printer warranties.
It’s possible that suitable refill options are limited or won’t be reliable long-term.
Can you modify the printer's firmware to accept the refilled toner?
Toner is not the same as ink. You will need to purchase a new toner cartridge.
When you actually run the cartridge out of toner, the chip inside is meant to cause a brick. Usually you’d just swap it for a different one. For other Brother HL-L2370 models, standard cartridges like TN 730 (1200 pages) and TN 760 (3000 pages) are easy to find. But for your HL-L2370 model with the DN, Brother switched to similar TN 2405 (1200 pages) and TN 2455 (3000 pages) cartridges, likely to complicate matters. These chips are sometimes used to boost the company’s profits, but they can fail completely without any reason. I’ve seen brand new, genuine cartridges stop working suddenly unless you either move the chip from an older cartridge or replace it with a different one. If print quality matters to you, keep some spare chips ready—even if you only use genuine ones. Or at least have extra cartridges on hand while you return the faulty ones for warranty. Take out those chips before recycling the cartridges!
Talking about firmware, HP has begun enforcing updates that block aftermarket chips and even expired genuine ones. Newer Brother firmware, on the other hand, intentionally reduces print quality for cartridges with aftermarket chips. You might want to consider skipping any firmware updates as well.