My trusty Laserjet 1320tn has started artifacting at the left side of a portrait page or the top of a landscape page.
If no printing is done near the paper edge, eventually the artifact fades. In the example photo, the previous page contained a graphic black box at the top of a landscape page. You see the artifact of that box repeats several times on the page. The toner cartridge and transfer roller have been replaced without improving the situation. I am hoping someone can recognize the repeat pattern to provide advise. What do I try next?