Hello guys. I have a begginer question : i refilled a hp 39A cartridge and it does ghosting on print with a gray background. The wiper blade seems ok.The curious thing is that if the tray 2 is set to custom paper and and the machine prints 1/2 speed, it prints fine. If i set tray 2 to a4 and prints full speed, ghosting appears. Bad pcr maybe? I just cannont explain how from a tray prints fine and from another tray does the things mentioned above
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