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Alb5 Honor Student
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Printed sheets, with little regular signs.

HP Color LaserJet Pro MFP M377 PCL 6
Microsoft Windows 10 (64-bit)
Hello, I have a problem with my printer HP Color LaserJet Pro MFP M377 PCL 6. Printed sheets, when exiting the printer, have little regular red signs on the long side to the right. How can I solve this problem?
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Professor
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Printed sheets, with little regular signs.

Evenly spaced defects are either cartridge or fuser issue. As you indicate they are red likely there is a defect in the magenta cartridge. 

Find this information helpful? Please click Kudos or tag as solution. I am not an employee of HP but a current field service tech with 20+ years real world experience troubleshooting and fixing HP Imaging hardware.
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Alb5 Honor Student
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Printed sheets, with little regular signs.

Thank you for your reply.

If I understand correctly, a possible solution could be the replacement of the magenta cartridge. I’lll try to do it, although in color printouts the image with red is good.

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Professor
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Printed sheets, with little regular signs.

can you post a sample?

Find this information helpful? Please click Kudos or tag as solution. I am not an employee of HP but a current field service tech with 20+ years real world experience troubleshooting and fixing HP Imaging hardware.
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