I got a call for a printer that’s having issues with the yellow toner cartridge only. When printing a PQ Troubleshooting page a white line shows on top of the paper, also the first PQ page (small square box) the yellow color is off the square box. The original problem is that the yellow color comes off margin when the user prints. Although it sounds like is not calibrated I have performed a full calibration many times, about 4 times with the old toner, used a new toner then repeated full calibration about 5 times and still. I printed a test page without the yellow toner (disabled cartridge check option) and it was fine (no yellow color of course). I went to the HP site and did all the troubleshooting as advised and as last resort they ask to contact HP for support but this is not an option for me since I am the tech. I am looking for an advice, maybe something I have not done?
a sample taken from the HP website.