HP LaserJet Pro 400 color M451dn - Printer - color - duplex - laser - Letter/ Legal - 600 dpi x 600 dpi - up to 21 ppm mono / up to 21 ppm color - capacity: 300 sheets - USB/ 10/100Base-TX Logo

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Daphne Dougherty Posted on Jan 01, 2016
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Printing blue toning in entire background.

Color doc tones whole page, black tones blue about an inch strip at top of page.

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Anonymous

  • 31 Answers
  • Posted on Sep 04, 2007

SOURCE: HP 4si

Hi, When I've worked on printers with this problem in the past it usually comes from the high voltage power supply going bad. There is also a low voltage power supply that runs everything except the actual printing so your printer will still operate without any errors but the print quality will go bad. The high voltage power supply is located under the bottom of the printer and it's too hard to replace. I can't advertise for any place on this site, but if you type in the part that you need into a search engine and look for parts on everyone's favorite bidding web site you should find the parts you need. Good luck.

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Anonymous

  • 417 Answers
  • Posted on Dec 26, 2007

SOURCE: printing black on the entire page.

Have you tried to change the print cartridge as black print is usually down to the print cartridge faulty. The other possibility is that the cartridge contacts are dirty or broken.

Hope this helps
Cheers J

Inkworks

Orn Wilson

  • 104 Answers
  • Posted on May 21, 2008

SOURCE: Color Quality is not so great anymore

Sounds like the machine needs to be cleaned. Probably a heavy use machine that has quite a bit of ink spray build up on the inside. I would imagine your service station has quite a bit of ink build up in it as well possibly causing the cartridges not to be cleaned like they should. A good cleaning cures most of what ails inkjet printers. We would charge $85 in our shop for complete disassembly down to the metal frame and cleaning.

Inkworks

A

Anonymous

  • Posted on Sep 18, 2008

SOURCE: Grey background over entire page.

If toner is getting onto the transfer belt, it can only get there by either being put there intentionally, or leaking.

Failure of Transfer Belt is normally degraded print quality - usually poor density, or a failure of the support behind the belt (usually puncturing the belt), and scoring a drum.

Anonymous

  • 35 Answers
  • Posted on Mar 06, 2011

SOURCE: Getting black strip about 9/16"

it may be due to either malfunctioning of the scanner tube within the printer itself or whenever you copy a certain page the lid is not properly pace resulting to excess light on that side giving you black line when the copying is in process

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Sep 25, 2008 • Xerox DOCUMATE 510 Flatbed Scanner
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3535
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NOTE: Printing the chart for Auto Gradation does not increase the meter count.
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Jun 24, 2008 • Xerox DocuColor 3535 Copier
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Color Quality is not so great anymore
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Inkworks
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Hp 4si laser jet prints the page with heavy dark toning on both edges right & left . Lately toning dark over the entire face of the page , makes otherwise good printing hard to read . The edge toning is...
Hi, When I've worked on printers with this problem in the past it usually comes from the high voltage power supply going bad. There is also a low voltage power supply that runs everything except the actual printing so your printer will still operate without any errors but the print quality will go bad. The high voltage power supply is located under the bottom of the printer and it's too hard to replace. I can't advertise for any place on this site, but if you type in the part that you need into a search engine and look for parts on everyone's favorite bidding web site you should find the parts you need. Good luck.
Read full answer
Sep 04, 2007 • HP LaserJet 4si Printer
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LaserJet Pro 400 color M451dn - Printer - color - duplex - laser - Letter/ Legal - 600 dpi x 600 dpi - up to 21 ppm mono / up to 21 ppm color - capacity: 300 sheets - USB/ 10/100Base-TX

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Canon i sensys lbp5050 When I performs any colored printing document. The printer dyes the white page with dark blue color as a background for my document. All white portions in my document are always

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