Question about Brother MFC 7420 All-In-One Laser Printer
print out is basically due to cartridge related issues. Take out the
cartridge and clean its drum/ (green roller) with a dry, soft,
lint-free cloth. The drum is usually located under a cover. Checkout for
any spilled toner inside the printer and clean it also. Print a few
pages so that the parts get further cleaned. I think, this would solve
Moreover, black streaks (thicker lines) and dots etc indicate faulty PCR Roller which is located behind the green drum inside the cartridge. In this case refilling would not help.
So, it is recommended that you replace the cartridge with a genuine one (not any replacement or refill).
Let me know if any further clarification is required.
Hope it helps! Good Luck!
Posted on Apr 07, 2011
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Posted on Jan 02, 2017
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