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Hello, one idea is that you rouined printhead with tap water and second idea is to buy new print head or printer. Note: If you want to replace ink head, be sure to replace purge unit and ink absorber also.
pull out the black cartridge then get a tissue paper try pressing the nozzle again the tissue paper but not so hard then release look for the straight line that appear on the tissue paper if it is not change it
Found this on the web. Click on link below to print the entire manual out to keep. Below are steps to do cleaning. If you find this helpful pls rate me. Thanks and Good Luck. http://www.brother-usa.com/ModelDocuments/Consumer/Users%20Manual/UM_MFC_210C_420CN_EN_286.PDF How to improve print quality Cleaning the print head To ensure good print quality, the MFC will regularly clean the print head. You can start the cleaning process manually if needed.Clean the print head and ink cartridges if you get a horizontal line inthe text or graphics on your printed pages. You can clean Black onlyor three colors at a time (Cyan/Yellow/Magenta), or all four colors at once. Cleaning the print head consumes ink. Cleaning too often uses ink unnecessarily. Caution Do NOT touch the print head. Touching the print head may cause permanent damage and may void the print head’s warranty. 1 Press Ink. 2 Press ▲ or ▼ to select Cleaning. Press Menu/Set. 3 Press ▲ or ▼ to select Black, Color or All. Press Menu/Set. The MFC will clean the print head. When cleaning is finished,the MFC will go back to standby mode automatically.If you clean the print head at least five times and the print hasnot improved, call Brother Customer Service (see Brother numbers on page i). Checking the print quality If faded or streaked colors and text appears on your output, some of the nozzles may be clogged. You can check this by printing the Print Quality Check Sheet and looking at the nozzle check pattern. 1 Press Ink. 2 Press ▲ or ▼ to select Test Print. Press Menu/Set. 3 Press ▲ or ▼ to select Print Quality. Press Menu/Set. 4 Press Color Start. The MFC begins printing the Print Quality Check Sheet. 5 Check the sheet to see if the quality is OK by following these steps: Color block quality check The LCD shows: 6 Check the quality of the four color blocks on the sheet. 7 If all lines are clear and visible, press 1 (Yes), and go to Step 10. —OR— If you can see missing short lines as shown below, press 2 (No). The LCD will ask you if the print quality is OK for black and three colors. OK Poor Is Quality OK? 1.Yes 2.No Black OK? 1.Yes 2.N 8 Press 2 (No) for Black or three colors with a problem. The LCD shows: Press 1 (Yes). The MFC will start cleaning the print head. 9 After cleaning is finished, press Color Start. The MFC will start printing the Print Quality Check Sheet again and then return to step 5. 10 Press Stop/Exit.
Found this on the web. Click on link below to print the entire manual out to keep. Below are steps to do cleaning. If you find this helpful pls rate me. Thanks and Good Luck. http://www.brother-usa.com/ModelDocuments/Consumer/Users%20Manual/UM_MFC_210C_420CN_EN_286.PDF How to improve print quality Cleaning the print head To ensure good print quality, the MFC will regularly clean the print head. You can start the cleaning process manually if needed.Clean the print head and ink cartridges if you get a horizontal line inthe text or graphics on your printed pages. You can clean Black onlyor three colors at a time (Cyan/Yellow/Magenta), or all four colors at once. Cleaning the print head consumes ink. Cleaning too often uses ink unnecessarily. Caution Do NOT touch the print head. Touching the print head may cause permanent damage and may void the print head’s warranty. 1 Press Ink. 2 Press ▲ or ▼ to select Cleaning. Press Menu/Set. 3 Press ▲ or ▼ to select Black, Color or All. Press Menu/Set. The MFC will clean the print head. When cleaning is finished,the MFC will go back to standby mode automatically.If you clean the print head at least five times and the print hasnot improved, call Brother Customer Service (see Brother numbers on page i). Checking the print quality If faded or streaked colors and text appears on your output, some of the nozzles may be clogged. You can check this by printing the Print Quality Check Sheet and looking at the nozzle check pattern. 1 Press Ink. 2 Press ▲ or ▼ to select Test Print. Press Menu/Set. 3 Press ▲ or ▼ to select Print Quality. Press Menu/Set. 4 Press Color Start. The MFC begins printing the Print Quality Check Sheet. 5 Check the sheet to see if the quality is OK by following these steps: Color block quality check The LCD shows: 6 Check the quality of the four color blocks on the sheet. 7 If all lines are clear and visible, press 1 (Yes), and go to Step 10. —OR— If you can see missing short lines as shown below, press 2 (No). The LCD will ask you if the print quality is OK for black and three colors. OK Poor Is Quality OK? 1.Yes 2.No Black OK? 1.Yes 2.N 8 Press 2 (No) for Black or three colors with a problem. The LCD shows: Press 1 (Yes). The MFC will start cleaning the print head. 9 After cleaning is finished, press Color Start. The MFC will start printing the Print Quality Check Sheet again and then return to step 5. 10 Press Stop/Exit.
There is more, but too long to put here.
You said you just replaced the ink jets. Did you clean the print heads? Here is Link on Web. If you find this helpful pls rate me. Thanks http://www.brother-usa.com/ModelDocuments/Consumer/Users%20Manual/UM_MFC_210C_420CN_EN_286.PDF How to improve print quality Cleaning the print head To ensure good print quality, the MFC will regularly clean the print head. You can start the cleaning process manually if needed. Clean the print head and ink cartridges if you get a horizontal line in the text or graphics on your printed pages. You can clean Black only or three colors at a time (Cyan/Yellow/Magenta), or all four colors at once. Cleaning the print head consumes ink. Cleaning too often uses ink unnecessarily. Caution Do NOT touch the print head. Touching the print head may cause permanent damage and may void the print head’s warranty. 1 Press Ink. 2 Press ▲ or ▼ to select Cleaning. Press Menu/Set. 3 Press ▲ or ▼ to select Black, Color or All. Press Menu/Set. The MFC will clean the print head. When cleaning is finished, the MFC will go back to standby mode automatically. If you clean the print head at least five times and the print has not improved, call Brother Customer Service (see Brother numbers on page i).
Open the HP Printer Toolkit (this software was installed from the CD-ROM that came with the HP printer) and run a "cleaning cycle",
because some of the ink-jets are clogged, which results in the "all-white" horizontal lines, where some part of that line should be black.
HP Officejet Pro L 7680 All in one printer prints with a white line running horizontally through all the letters.
Can anyone help?
Thank You,
Alfred F. Marton [email protected]
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