Brother DCP-9020CDW - Black colour only printing lines

Dec 3, 2019

I am getting black vertical lines on the test page. Black colour is only printing lines. Rest of three colours seem to be printing fine. I tried changing the black toner with a different color (e.g. Cyan) toner but still getting same vertical line except this time vertical lines were cyan. Can you please tell me what may be wrong with the printer? It seems like toner cartridges are fine. See attachment for test page printout.

thanks for you help.


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