Yep, thats printers for you!!! It is one of a few things, but we will narrow them down. First, when you replaced it is it in best correct position and not sitting up, some people accidenatlly fail to push it properly home and this reslts in no printing. If it is ok, is the colour ink printing ok. Post back as this helps identify issues.
Replace the printer cartridge or clean cartridge head using clean mode .you may also need to replace the cradle to inkjet site on in some models(canon BIC for example)
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