HP 6050 leaving black marks of the back of prints

You can find the user's guide here which lists all the parts and supplies. Here's the cartridge information from the manual:

• HP Color LaserJet black print cartridge Standard black cartridge CE260A
• HP Color LaserJet black print cartridge High-capacity black cartridge for CLJ4525 models only CE260X
• HP Color LaserJet cyan print cartridge Cyan cartridge CE261A
• HP Color LaserJet yellow print cartridge Yellow cartridge CE262A
• HP Color LaserJet magenta print cartridge Magenta cartridge CE263A

You can use the HP numbers to look for original or after-market replacements.

Install the old black tonner back inside, if the yellow vertical marks disappear then the problem is in the new black tonner

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

If you need more help come back.Post / thumbs / testimonial are welcome!

The 3550 won't print in any color if any of the colors are out. You'll have to replace the color ink that's empty to get it to print.

In the future, if you're just printing black and white, you can select "Print in Grayscale" from the print properties to just use the black ink cartridge, which will help the color cartridges to last longer.

hi,
HP Officejet 5610 All-In-One InkJet Printer has few common problems. Such as Driver CD lost, Scanner does not work, Connection problem etc. For find all these software solution just click here....


http://www.hp.com/printer/prob676ijt65/solution

astrtr11

Black is used on all prints. Did you pull the tape on the new cartridge?

Have you replaced with original HP cartridges? HP mark is well known for sensitivity to non-original cartridges.

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HP Color LaserJet 2600n Printer - Installing Print Cartridges When a print cartridge approaches the end of useful life, the control panel displays a message recommending that to order a replacement. The printer can continue to print using the current print cartridge until the control panel displays a message instructing to replace the cartridge. The printer uses four colors and has a different print cartridge for each color: black (K), cyan (C), magenta (M), and yellow (Y). Replace a print cartridge when the printer control panel displays one of the following messages: Replace yellow cartridge, Replace magenta cartridge, Replace cyan cartridge, Replace black cartridge. The control panel display also indicates the color that should be replaced (unless a genuine HP cartridge is not currently installed). Change the print cartridge

1. Turn off the printer.
2. Open the front door. CAUTION: Do not place anything on the transfer belt (ETB), which is located on the inside of the front door.
3. Remove the used print cartridge from the printer.
4. Remove the new print cartridge from the bag. Place the used print cartridge in the bag for recycling.
5. Grasp both sides of the print cartridge by the blue handles and distribute the toner by gently rocking the print cartridge from front to back. CAUTION: Do not touch the shutter or the surface of the roller.
6. Remove the orange shipping locks and the orange shipping tape from the new print cartridge. Discard the shipping tape and shipping locks according to local regulations.
7. Align the print cartridge with the tracks inside the printer, and using the handles, insert the print cartridge until it is firmly seated.
8. Firmly close the front door.
9. Turn on the printer. After a short time, the control panel should display Ready.
   NOTE: If a cartridge is in the wrong slot or is the wrong type for the printer, the control panel will display one of the following messages: Incorrect yellow, Incorrect magenta, Incorrect cyan, Incorrect black.
10. Installation is complete. Place the used print cartridge in the box in which the new cartridge arrived. See the enclosed recycling guide for recycling instructions.
11. If a non-HP print cartridge is in the printer, check the printer control panel for further instructions.
    NOTE: When replacing or changing a black print cartridge, a cleaning page will automatically print. This helps prevent speckles on the front or back of printed documents. A cleaning page can also be generated using the control panel or the HP Toolbox.

brother mfc-5440 ~ same exact issue on not printing the black AFTER purchase new cartridge (again!) ~ i should have checked here first.... NO MORE BROTHER printers in our future & will tell all our friends, too....

Hi!

If you could possibly manage to access the machine status menu and have it print to check the drum's life, fuser life, developer, etc.. pls refer. Kindly replace the toner cartridge accordingly use the menu settings when replacing any color if needed. Please print solid image or block in each color Cyan, Magenta, Yellow and Balck. Well see if what color causing the problem. Please let me know the print result it may be; washed out or too light, too bright or black, double image, or not clean. Don't hesistate to contact me again about the result.

Best regards,
Rosener Guyano