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Grey shading likely due to either bad black cartridge. Try a different cartridge first thing. After that, print a PQ quality test page from the control panel to see if they defect shows on all pages. If it does then you may have a bad transfer belt.
Apr 26, 2011 - 2 posts
I have a HP Color LaserJet 2840. If I am ... My Color LaserJet 2840 will only print on the right side of the page, how can I fix this? ... If I am copying or printing from the computer, the printer will only print the right side of the page. ... something obstructing the laser scanner blocking that side of the media path.
you may know that this model of printers is very old
i think your cartridge is expiered try to change the cartridge if by the old one just to test....
if the new cartridge is the reason then you have to replace it
All cartridges are new...report shows 0 pages for yellow left yet all others added at the same time show thousands of pages left. Everything printed is in black with no color. BTW: I have 3,000 pages left with black cartridge and the display says I need black.
When installing new cartridges, it's always a great idea to perform a cleaning and recalibration of the machine. Below are the steps needed to do just such a task. You may want to print these out or save them somewhere for future reference as well. They are directly from the HP website.
Please rate the tip accordingly and thanks for using Fixya.com. Cleaning the printer
Verify the printer is turned on and in the Ready state.
Open the HP Color LaserJet 2500 Toolbox. Click Cleaning Page on the Troubleshooting tab, and the click Print (HP Color LaserJet 1500 or 2500) or Cleaning Page (HP Color LaserJet 2550). A page with a pattern prints from the printer.
Remove any paper that may be in tray 1.
Remove the page that printed and load it face down into tray 1.
At the computer, press Clean .
Calibrating the printer
There are two methods of calibrating the printer manual: at the printer or from the Toolbox on the computer.
From the printer
Turn the printer off and then on again.
From the HP Color LaserJet 1500 or 2500 Toolbox on the computer
Open the HP Color LaserJet 1500 or 2500 Toolbox in one of the following ways:
Double-click the HP Color LaserJet 1500 or 2500 Toolbox icon on the computer desktop.
Select Start , Programs , HP Color LaserJet 2500 , and then HP Color LaserJet 1500 or 2500 Toolbox to open the Toolbox from the Windows desktop.
Click Diagnostic Tools on the left side of the screen on the Troubleshooting tab.
Click Color Calibration to perform the calibration procedure.
From the HP Color LaserJet 2550 Toolbox on the computer
Open the HP Color LaserJet 2550 Toolbox in one of the following ways:
Double-click the HP Color LaserJet 2550 Toolbox icon on the computer desktop.
Select Start , Programs , Hewlett-PackardHP Color LaserJet 2550 series , and then HP LaserJet Toolbox to open the Toolbox from the Windows desktop.
Click Print Quality Tools on the left side of the screen on the Troubleshooting tab.
Click the Calibrate Now button to perform the calibration procedure.
This is a very common problem with this model printer, it is caused by toner on the scanner mirrors. You need to clean the scanner assembly unfortunately it isn't very easy to dissemble the printer to get to it.