I have black spots on the upper left corner on my Pro 100

My printer started to leave a black stain on the upper left corner of anything beyond 5 x 7.  I changed the black cartridge, cleanied foam more run all maintenance tools.  Thank you

I feel pretty stupid, but I thought about it. Somehow the paper box, I was working on the upper left corner of all leaves somehow got bent slightly upwards so when the document deleted from the bottom plate that the corner would come just enough print head dragged against the paper. Thanks a lot for your help.

Tags: Canon Printer

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