If colleagues experience print & shaded lines on the hp laserjet pro 400 m401n printer. In a simple way, colleagues can check the cartridge / toner section first. if the cartridge\toner section is not clean, colleagues can replace the cartridge\toner first. if you have replaced it, there are still lines, it can be caused by the mechanics in the printer being affected, such as worn film & pressure\LPR, the scanner can also be dirty. I hope this channel helps... Help like & subscribe too so that this channel continues to grow
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Printer hp laserjet pro 400 shaded line results. suboptimal results. bad print
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