The toner or drum counter needs to be reset.The toner or drum is not installed properly.Incorrect toner cartridge is installed.The following reasons may cause Brother printer not to recognize a new toner cartridge： So, under the guidance of our engineers, we researched the cause of this problem and found some ways to fix it. Printer users may encounter this issue whether using compatible toner cartridges or genuine Brother toner cartridges. We did some research on this topic and found that Brother printer not recognizing new toner cartridge is a common problem with Brother printer. Why is my Brother printer not recognizing new toner cartridge?
