Question about Brother HL 4000CN Laser Printer

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Print quality I have just developed a problem with my printer, the top quarter of the page is left virtually blank, if printed in black I can just about make out a faint print, the rest of the page is fine. It has been ghosting at the end of the page for sometime now. I have the manual on this printer and in the fault finding it doesn't include this problem. Any ideas?

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SOURCE: Print quality bad

To clear white vertical lines from printed documents follow the steps listed below:

NOTE: The use of non-Brother or generic toner may cause white vertical lines.

Brother strongly recommends that customers do not use generic drum units and/or toner cartridges, or refill their Brother toner cartridge. Each Brother laser printer is designed to work at pre-set temperatures that are matched exactly to each of our individual toner formulations. Each individual component is designed to work with the other to ensure quality and reliability. Using non-Brother supplies may affect the hardware performance, print quality and machine reliability.
The Brotherlimited warranty does not apply to any problem that is caused by the useof unauthorized third party drum units, toner cartridges or toner.

1. First, power OFF the unit for safety. The ON/OFF switch is located on the left, rear side of the unit.

2. Open the scanner cover by pulling the blue lever located below the control panel toward you and lifting the cover. Make sure the cover is completely open.

3. Remove the drum unit by holding each side of the drum by its handles and gently lifting the drum forward (toward) you.

4. Place the drum unit on a drop cloth or large piece of disposablepaper to avoid spilling and scattering the toner. Make sure thedirections and DR-250 stickers are facing you.

5. With the drum removed from the Brother machine, clean the laser glass. The laser glass is located inside the Brother machine where the drum was located. It is a piece of glass, about 1/2 inch wide and approximately 8 inches long, located on the bottom of the inside. Gently wipe the glass with a clean soft DRY cloth. DO NOT use isopropyl alcoholor any liquid to clean the glass.

6. Gently pull up on the mauve lever to turn the toner cartridge toward you until it stops. Remove the toner cartridge from the drum unit by gently sliding it out of the drum unit. ***Handle the toner cartridge carefully. If toner scatters on your hands or clothes, immediately wipe it off or wash it with cold water.

7. Gently rock the toner cartridge from side to side five or six times to distribute the toner evenly inside the cartridge. Then, reset the toner into the drum (be sure it clicks into place). Gently push on the mauve lever to turn the toner cartridge away from you until it stops.

8. With the DR-250 sticker facing you turn the drum upside down. There is a blue tab located on the right side. Slide the blue tab back and forth seven times to clean the corona wire. When finished, make sure the blue tab is locked to the right side of the drum.

9. Reset drum unit in Brother machine. Close the cover securely.

Print the help list to test the unit by pressing the REPORTS key located on the control panel and then (1) on the dial pad.

If the white vertical lines still continue, the drum unit will need to
be replaced.

If the purchase date of the original drum or replacement drum is less than 90 days (within the warranty of the drum), contact Brother Customer Service Center at 1-877-Brother (1-877-276-8437) . The center is open Monday-Friday, 9:00am to 7:00 pm EST, excluding holidays.

Posted on Dec 27, 2007

  • 150 Answers

SOURCE: Printing blank page at the end of every printing job

Hi Keren,

1) Are you sure it is the printer, not the software application ?

Try printing a single "Hello World" message from "Notepad"

If there is no blank page at the end of it, the problem is in
the specific software app: Office, Word, Excel, etc...

2) What application are you printing from?

a) Check the page and print setup.

b) Make sure the application's "page size" and the printer's
paper size are consistent. Pay special attention to
metric paper sizes vs English:

E.g. A4 vs Letter

If the page with margins is bigger than the paper, it will
generate a new page, even though there are no visible
characters on it.

c) Check the print margins within the page setup:
In MS-Office: File ---> Page Setup --->

d) Add a single character to the very bottom of your
document, and see if it wraps around onto the last page.

Microsoft office applications are notorious for wrapping
the last PARAGRAPH character onto the next page if
it does not quite fit onto the paper.

e) if you are using MS WinWord, go into options and set it
to display all special characters:

Check to make sure that there are no page-breaks at
the end of the document.

Also look for extra paragraph marks/ carriage returns,
and check the format settings on the last paragraph
mark in the document:

Page brake before...
Keep lines together ....
Widow and orphan control ...

which can cause the last paragraph mark to generate a
new page. If the last paragraph mark is not formatted
the way you want it, make sure that you save the
TEMPLATE after you change it, since this is the
DEFAULT setting for all new documents.

Finally it is also possible for Windows applications to look
different on the screen than the final print due to small
(but cumulative) True Type Font (TTF) computation erros,
such that a 10 page document on the screen can actually
page-split in weird places printing as 11 pages.

I have the identical model of printer, and it does NOT seem
to have any settings for printing banners or adding separator
pages, at least not in my printer driver, but this is NOT to say
that the applications you are using are not causing this

I hope this gets you started.

Please rate my answers.

Posted on Jul 01, 2008

  • 1 Answer

SOURCE: Print faded after replacing black cartridge Brother 240C

The print heads don't appreciate being out of ink so the Brother printer has sensors to prevent that but the tape defeated that prevention. Maybe more cleanings or maybe a cartridge with printhead cleaning solution will help. Otherwise, I fear a new printer.

Posted on Jan 08, 2009

  • 292 Answers

SOURCE: Printer prints blank pages from notepad, word, and excel.

Hi tim8094

Obviously there is nothing wrong with the printer, because you are able to print from the Internet.

Before attempting to print from word, excel etc, make sure you have the correct printer selected (check it through FILE MENU -> PRINT ->PROPERTIES)
Do a print test by typing just couple of words -may be in different color-
Best of luck

Posted on Sep 22, 2009

  • 265 Answers

SOURCE: How to clean the print head - Brother MFC-685CW Inkjet Printer?

Replace the printhead !

Posted on Dec 11, 2009

  • 1684 Answers

SOURCE: Ghost printing


You have a worn image drum. The drum is the part of the printer that the print image is created on before it transfers the toner to the paper. This part is coated with a very thin layer of Teflon so the toner does not stick. When it gets worn the toner starts to stick and that produces the shadow or ghost image approximately 3 inches down the page because the diameter of the drum roller is 3 inches. You will need to get the part DR-350, Office Depot has them as well as many places on the internet.

I hope this helps, if so please rate our solution.

Corporate Computer

Posted on May 14, 2010

Testimonial: "I really appreciate the answer! I will go buy a new drum. Thanks again for your help! I appreciate it very much! "

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Check the settings in Windows Print Manager.

Make sure that the paper quality matches what is in the printer. If set to glossy, minimal ink is deposited on the page. Also, check the print quality - draft quality provides a minimal amount of ink as well.

Jan 17, 2015 | HP PS C4780 All in One InkJet Printer

1 Answer

Printer full of ink, but will pring pages either blank of with smeared ink.

Follow these steps to check the print settings for your print job.
  1. In the software program you are trying to print from, click File and then click Print . The Print dialog box opens.
  2. Select your product, and then click Properties . The printer Properties dialog box opens.
  3. Click the Printing shortcuts tab.
  4. Under Printing shortcuts , click the type of job you are trying to print.
  5. Review the following options, and then make any necessary changes.
    • Paper size : Make sure that the selected option matches your paper size.
    • Paper type : If one of the options matches your paper type exactly, select that option.
    • Print quality : If you are not satisfied with your printed page quality, or want more densely printed prints, increase the print quality. To print more quickly, or for lighter prints, decrease the print quality.
  6. Click the Features tab.
  7. Check the Print in Grayscale setting
    • If you are trying to print in color, select Color Options , and then make sure that Print in Grayscale is not selected.
    • If you are printing a black and white image, select Print in Grayscale to fix streaking in black areas.
  8. Click OK , and then click OK again to start the print job.
Make sure the printer is loaded with unused white paper.
Open HP Solution Center , then click Settings , then Printer Toolbox .
Select the Services tab.
Click Print PQ (print quality) Diagnostic Page .

Make sure the printer is loaded with unused white paper.
Open HP Solution Center , then click Settings , then Printer Toolbox .
Select the Services tab, then click A- Click Align Printheads or
B- Click Clean Printheads .
C- Click Calibrate Linefeed .

If, after repeated printhead cleaning, the Print Quality Diagnostic page shows white lines across the color blocks in Test Pattern 2 (but no white lines in the gray blocks in Test Pattern 3), one or both of the printheads will have to be replaced. The Print Quality Diagnostic page shows which printhead should be replaced.

Try using the HP Scan Diagnostic Utility in Windows - HP Customer Care (United States - English)

Nov 16, 2010 | HP Officejet Pro L7780 All-In-One InkJet...

1 Answer

Black cartridge is new,magenta is new blue is halfway and yellow is halfway but the hp color laser jet 2600n prints lighter and black prints as it is finished

Hi Good day!!
Follow this method hope it helps you!!

During the printing process, paper, toner and dust particles can accumulate inside the printer. Over time, this buildup can cause print-quality problems such as toner specks or smearing. This printer has a cleaning mode that can correct and prevent these types of problems.
This printer has two processes for generating cleaning pages: one is automatically generated and one is manually generated. When a new black print cartridge is installed, a cleaning page will be automatically generated prior to calibration.
Clean the fuser using HP Toolbox
NOTE: Use the following procedure to clean the fuser using the HP Toolbox. To clean the engine when the computer is running an operating system that does not support HP Toolbox, see the late-breaking Readme on the root of the CD-ROM, or visit .

1 Make sure that the printer is turned on and in the Ready state.

2 Open the HP Toolbox using one of the following methods.
On the Windows desktop, double-click the HP Toolbox icon.
* On the Windows Start menu, click Programs (All Programs in Windows XP), click HP , click HP Color LaserJet 2600n, and then click HP Color LaserJet 2600n Toolbox .

3 Click the Troubleshooting tab, and then Troubleshooting Tools .
4 Click the Print button next to step 1, "Click the "Print" button to print out the Cleaning Page."

5 Remove the Cleaning Page from the output bin, and load it printed side down in Tray 1.

6 Click the Clean button to complete the cleaning process. Press the GO button on the printer control panel. The Cleaning page will print, with a second page adhered to the first page. This is normal behavior during the cleaning process.

Cleaning spilled toner
Defective print cartridges can develop leaks. Also, after a paper jam has occurred, some toner might remain on the rollers and guides inside the printer. The pages that print immediately after the jam can pick up this toner.
CAUTION: When cleaning the printer, do not touch the ETB with a damp cloth or with fingers.
Cleaning the paper path
The device features a special cleaning mode to clean the paper path.
NOTE: If there is access to HP Toolbox, HP recommends cleaning the paper path by using HP Toolbox.
Clean the paper path

1. Use the (LEFT ARROW) or the (RIGHT ARROW) button to select Service, and then press (SELECT).

2. Use the (LEFT ARROW) or the (RIGHT ARROW) button to select Cleaning Mode, and then press (SELECT).
A page feeds through the printer slowly. Discard the page when the process is completed.

3. Load plain letter or A4 paper when prompted.

4. Press (SELECT) again to confirm and begin the cleaning process.
A page feeds through the printer slowly. Discard the page when the process is completed.

Calibrating the printer
Calibrations are performed at regular intervals. For best print quality, a calibration can be performed from the control panel using the following steps:
NOTE: This will calibrate the color and clean the black electrostatic transfer belt (ETB).

1 Use the (LEFT ARROW) or the (RIGHT ARROW) button to select System setup and then press (SELECT).

2 Use the (LEFT ARROW) or the (RIGHT ARROW) button to select Print quality and then press (SELECT). Calibrate color will display on the control panel.

Press (SELECT).

3 Use the (LEFT ARROW) or the (RIGHT ARROW) button to select Calibrate now and then press (SELECT).

4 Press (SELECT) to start the calibration.

Other options for print quality defects that still persist

Oct 26, 2010 | Printers & Copiers

1 Answer

Printing blank pages on Lexmark C510 printer. Throws a 34 Short Paper error first, prints out a blank page. I have replaced the black toner, but problem continues. Demo page printed colors successfully but...

For 34 Short Paper error, reseat the tray guides and make sure it is set properly. Also, set the correct settings in the computer. For blank pages, always double-check the paper settings and again the settings in the computer. For not printing black, print the Print Quality page and see what color is not printed or not showing. If Print Quality shows black, try printing any document from any application in the computer. Check if you still have the problem. If problem is not resolved, leave a comment so I can get back to this.

Apr 09, 2010 | Lexmark C510 Laser Printer

1 Answer

The printer

You may need to clean the printhead: (make sure you have paper in the tray)

1) Press <Menu>

2) Press <Up> or <Down> arrow to select "Ink" then press <OK>

3) Press <Up> or <Down> arrow to select "Test print" then press <OK>

4) Press <Up> or <Down> arrow to select "Print quality" then press <OK>

5) Press the <Color Start> button. The quality test sheet will be printed. Check this printout for gaps in any of the colors or black in the pattern across the page.

6) The display on the printer will ask if the print quality is OK:

- If all lines are clear and visible, select "Yes"

- If gaps appear in the pattern, select "No"

7) If you select "No" the display asks (in turn) if the print quality is OK for black, and the three colors.

Respond "Yes" or "No" accordingly. (In this manner you may clean just the black or color nozzle that is giving you the problem)

8) The display asks if you want to start cleaning - choose "Yes"

9) After cleaning is finished press the <Color Start> button - the print quality sheet will print again.

At this point you may determine that another cleaning cycle is necessary. You may need to repeat cleanings (up to five times) to resolve the problem. Any more than that indicates a problem that may need brother customer support.

10) When the print quality test sheet meets with your approval, you may exit by pressing <Stop/Exit>

Jan 21, 2010 | Brother MFC-290C Printer

1 Answer

The print on the bottom half of the page is unclear - top half is great, but quality deteriorates near middle and bottom of page

The suspected problem in the imaging unit. If you have problem in one of the color (likely black) Then you have to change the black developer part in the imaging unit

Oct 21, 2009 | Samsung CLP 300 Laser Printer

1 Answer

Samsung CLP-300 poor print quality

black developer on drum worned out,need changing.

May 05, 2009 | Samsung CLP 300 Laser Printer

1 Answer

FP-7735 prints gray pages.

needs developer tech installed because of the adjustments that have to b done afterwards7734748865

Feb 02, 2009 | Panasonic FP-7735 Black and White Copier

1 Answer

Pages printing blank

Resolving white, light lines or streaks (eliminate light stripes)

From the printer, print the Troubleshooting Print Quality Pages.
With Troubleshooting highlighted, press the OK button.
Scroll to Print Quality Problems by pressing the Up or Down Arrow button. Press OK.

Scroll to Troubleshooting Print Quality Page. Press OK.
Evaluate the Light Stripes Test page for missing printhead jets (missing cyan, magenta, yellow or black color bars).

Clean the maintenance unit's wiper blade and empty the waste tray. A dirty maintenance drawer wiper blade can cause white lines and weak or missing printhead jets. Using a clean lint-free cloth or a paper coffee filter, gently clean the blade with a wiping motion across the entire length of the wiper blade.

Dec 20, 2008 | Xerox Phaser 8400 Laser Printer

1 Answer

Blank pages

You might want to start by doing some general print quality troubleshooting, including printing a test page. The test page should give you an indication if you have issues with print cartridges. Also, some printers may not print at all if even one of their cartridges is empty:

Correcting Print Quality Problems

The other thing that occurred to me is that your document feeder could be pulling in more than one sheet of paper at a time, this means it would output blank sheets as well. Here's a web page that describes the problem and what to do about it:

Automatic Document Feeder Error

Hopefully the answer to your problem is available in those web pages. Good luck.

Sep 07, 2008 | HP OfficeJet 4215 All-In-One InkJet...

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