Title: Does not work on MFC 5840CN
Product review: I was glad to find an inexpensive alternative to Brother inks. The first cartridge I installed was a yellow cartridge. My Brother MFC-5840CN said there was no cartridge installed. After fiddling around with it I was able to get it recognized, although I kept getting a low ink message. I was able to print a few pages and then I got the missing cartridge message again. This time I was not able to get the printer to recognize it. Hoping that it might be a faulty cartridge, I tried a second yellow cartridge. Same problem - the printer would not recognize it. Don't buy these, at least for the MFC-5840CN, unless you like contributing to landfill. These cartridges are a different shape than the Brother cartridges and just don't work.
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