I was just gifted this (used) Brother HL-3140CW and black only pages are printing clean with no problems, but I did a test color print and it came out like this 😱
Brother HL-3140CW Fuser Unit - 110 / 120 Volt - 50K, Genuine (M6312)
Amazon.com: Quality BLACK Toner for BROTHER TN221K, HL-3140CW, HL-3170CDW, MFC-9130CW : Office Products