My Brother HL-5250DN laser printer just stopped printing one day. The toner light came on indicating the cartridge was empty and it refused to print another page. I knew something was up because the last page I printed looked just fine. I reset the cartridge, rebooted the printer and still no cooperation from it. After 5 minutes of Google searching I discovered it’s a known scam and can be fixed by placing a small piece of black electrical tape over the round ink sensor on the right side of the cartridge. Sure enough after covering the sensor it started printing again. What really pissed me off is that it had TONS of ink left. I did this over 3 months ago and it’s still printing dark crispy blank ink with no fading whatsoever. I’ve printed at least 1000 pages since then.
Now here’s the most hilarious part of it all. Check out the tag line on their logo. “at your side” yeah right! They should change it to “guard your wallet” We need a class action lawsuit or at least public mockery of this rip off. Watch this quick video demo of how to beat the SCAM. Happy printing. Fight the power!

Just tried this with a cartridge that refused to work as it had apparently run out. Works a charm! Cheers.
That’s incredible.. those bastards… Printer ink has quickly become the most expensive liquid on the planet… hp’s printer department outperforms the rest of their entire business combined… all thanks to their liquid gold… and now (oh) Brother has devised a way to make us run back to the teat without draining it… There needs to be a a serious revolution.