THIS IS REAL.... I have confirmed the firmware/disable-ware presence at work. I had a mix of OEM and generic cartridges then after an update I started having the error. After swapping generic cartridges for old OEM that were empty, the error went away. VERY Interesting indeed.
I "got around" the hardware issue. I shouldn't have to do what I did, to use a generic cartridge. Now some generic's will accommodate "the workaround" but others require more skill/craftsmanship to do the same "work around." As for what that is: Get both your OEM cartridge and Generic side by side look them over VERY closely and you'll figure out what needs to go where. Some generic's are not as easy since if they are a larger more visible operation to Brother and others that play this game, it's obvious Brother and the like, have had influence in the generics designs to make it harder to "do" what you NOW have to use them. Now myself and most reasonable people would fully expect that a generic cartridge not perform the same way as the OEM, but to be disabled? Private property disabled after purchase for using a non-branded cartridge? Private property...disabled...after purchase... More on that later...
Okay it is later...
XEROX the company whose shoulder's you (Brother and any other that plays this disable ware game) stand upon, what if they decided tomorrow that every printer in the world that wasn't of Xerox brand but used Xerography no longer functioned via a registry patch, until purchasing rights to use, xerography? It would be pretty bad. Customers bailing out on you (Brother), couldn't sell your hardware for scrap. Brother you have essentially done just that by disabling private property. You are trying to do with cartridges what Microsoft tried with Web Browsers in the 90's. How did it go for them? That little company in Washington? With their tiny legal budget?
The consumer's right to repair is now legal precedent. The right to be able to choose consumables, like toner and ink knowing that the generic would likely function at a lesser grade than the original is a not rocket science. It is how the rest of the civilized world works.