I have a similar problem now: magenta stain over the entire page when printing anything with any color (even just a hyperlink); B&W text is no problem.Not the PC; even the Demo Page from the 4040 menu does this. Updated the 4040 firmware tonight to latest (1.24, etc), but no better.Recently replaced the Magenta cartridge (official Brother cartridge), though saw this problem near end-of-life of the previous Magenta cartridge. Drum Unit status is 42%, so not expected to be near end-of-life.
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