My problem is that when i print the black cartridge missing print area about 1 inch at right or may be at left side.this area comes white(mean no printing)i also change cartridge with new one but the problem is still present, my printer is 2600 n

Good luck, .........................................Pete

Print a diagnostic page If the steps above have not helped, print and evaluate a diagnostic page to see if the cartridges or the printer is causing the problem.

1. Make sure the printer is on and loaded with unused, plain, white paper.
2. Press and hold the Power button and then press the Cancel button. Release both buttons. The diagnostic page prints. Figure 1: Power and Cancel buttons 1 - Cancel button 2 - Power button

Step 4: Note which cartridges printed which areas of the diagnostic page You must identify which cartridge printed which part of the diagnostic page, so that if you find defects on the page, you will know which cartridge is the problem. However, you can install different combinations of print cartridges in your printer, and different cartridge combinations print different diagnostic page patterns. Your diagnostic page may not look exactly like the picture below, but the right and left cartridges will print in the same areas of the page no matter which cartridges are installed. Figure 2: Diagnostic page layout (the patterns in each area may look slightly different on your page) 1 - Printed by the right cartridge 2 - Printed by the left cartridge NOTE: If you are printing in reserve mode (one cartridge is missing), the missing cartridge's area of the diagnostic page will be blank. Step 5: Check ink levels NOTE: If you have installed a refilled or remanufactured ink cartridge, or a cartridge that has been used in another product, the ink level indicator is inaccurate or unavailable. Look in the middle of the diagnostic page. The bars with "E" (for "empty") and "F" (for "full") at each end show the ink levels in the cartridges. As ink is used, the solid color changes to a faded color. Figure 3: Left (tri-color) cartridge almost full - right cartridge empty Figure 4: Both left and right cartridges almost full

To see which color is having an issue, go to printer control panel and select "settings" > Tools> Print report> Print Quality report. When the page prints out, you will see which color is the problem. After you have figured that out, make sure the problem is not with the cartridge.
If you see lines or missing colors, clean the printhead by removing it from printer(open cover, lift gray latch on the right side of the cartridges, remove cartridges and the printhead will easily slip out by pulling up)
then soak the printhead in half inch deep amount of window cleaning solution. Preferably warm. Let soak at least 3 hours. Dry out the printhead and wipe rear conacts from moisture and dirt. Reinstall into printer and see the results.
-Alex
303Electronics eBay Stores http://www.303electronics.com/

If you need further help, I’m available over the phone at https://www.6ya.com/expert/alex_22751bbefa74c3d0

Checking the ink levels

1. Open the HP Director .
2. Click Settings , point to Print Settings , and then click Printer Toolbox .
3. After the Printer Toolbox opens, click the Estimated Ink Level tab.
4. For information on obtaining replacement cartridges, click Print Cartridge Ordering Information .

Replacing the print cartridges

1. Make sure the HP all-in-one is on. WARNING: If the HP all-in-one is off when the print-carriage access door is lifted to access the print cartridges, the HP all-in-one will not release the cartridges for changing. Damage may occur to the HP all-in-one if the print cartridges are not docked safely on the right side when you try to remove them.
2. Open the print-carriage access door by lifting from the front center of the device, until the door locks into place. The print carriage is on the far right side of the HP all-in-one. 1 - Print carriage access door 2 - Print carriage
3. When the print carriage is idle and silent, press down on the end of each cartridge to snap it out of the carriage. If replacing the tri-color print cartridge, remove the print cartridge from the slot on the left. If replacing the black or photo cartridge, remove the print cartridge from the slot on the right. 1 - Print cartridge slot for the tri-color print cartridge 2 - Print cartridge slot for the black and photo print
4. Gently pull the print cartridge toward you, out of its slot.
5. If removing the black print cartridge to install the photo or gray photo print cartridge, store the black print cartridge in the print cartridge protector.
6. Remove the new print cartridge from its packaging and, being careful to touch only the black plastic, gently remove the plastic tape by using the pink pull tab. CAUTION: Do not touch the copper-colored contacts or ink nozzles. Touching these parts can result in clogs, ink failure, and bad electrical connections. 1 - Copper-colored contacts 2 - Plastic tape with pink pull tab (must be removed before installing) 3 - Ink nozzles under tape
7. Slide the new print cartridge forward into the empty slot. Push the print cartridge forward until it clicks into place. If the print cartridge you are installing has a white triangle on its label, slide the print cartridge into the slot on the left. The label for the slot is green with a solid white triangle on it. If the print cartridge you are installing has a white square or a white pentagon on its label, slide the print cartridge into the slot on the right. The label for the slot is black with a solid white square and a solid white pentagon on it.
8. Close the print-carriage access door.

Replacing the print cartridges

1. Make sure the HP all-in-one is on. WARNING: If the HP all-in-one is off when the print-carriage access door is lifted to access the print cartridges, the HP all-in-one will not release the cartridges for changing. Damage may occur to the HP all-in-one if the print cartridges are not docked safely on the right side when you try to remove them.
2. Open the print-carriage access door by lifting from the front center of the device, until the door locks into place. The print carriage is on the far right side of the HP all-in-one. 1 - Print carriage access door 2 - Print carriage
3. When the print carriage is idle and silent, press down on the end of each cartridge to snap it out of the carriage. If replacing the tri-color print cartridge, remove the print cartridge from the slot on the left. If replacing the black or photo cartridge, remove the print cartridge from the slot on the right. 1 - Print cartridge slot for the tri-color print cartridge 2 - Print cartridge slot for the black and photo print
4. Gently pull the print cartridge toward you, out of its slot.
5. If removing the black print cartridge to install the photo or gray photo print cartridge, store the black print cartridge in the print cartridge protector.
6. Remove the new print cartridge from its packaging and, being careful to touch only the black plastic, gently remove the plastic tape by using the pink pull tab. CAUTION: Do not touch the copper-colored contacts or ink nozzles. Touching these parts can result in clogs, ink failure, and bad electrical connections. 1 - Copper-colored contacts 2 - Plastic tape with pink pull tab (must be removed before installing) 3 - Ink nozzles under tape
7. Slide the new print cartridge forward into the empty slot. Push the print cartridge forward until it clicks into place. If the print cartridge you are installing has a white triangle on its label, slide the print cartridge into the slot on the left. The label for the slot is green with a solid white triangle on it. If the print cartridge you are installing has a white square or a white pentagon on its label, slide the print cartridge into the slot on the right. The label for the slot is black with a solid white square and a solid white pentagon on it.
8. Close the print-carriage access door.
   

The problem you are experiencing is caused by the way the text is formatted in most word processing documents. By default envelopes are printed not in black, but a dark gray. This confuses the printer and causes it to use the color cartridge to process gray instead of using the black cartridge. You can fix this problem with one of 2 ways.
Please select the "Black" only option following the steps given below:
1. Click on "Start," "Control Panel" and click on "Printers and Faxes."
2. Right click on the "Lexmark printer icon" and select "Properties."
3. Select "Printing Preferences," click on the "Quality/Copies" tab and choose "Print Color images in Black and White."
4. Select "OK."
You can also change the color of your text to a true black in your word processor. This will require you to resort to the word processor's documentation and help files.
Both of these settings will cause your printer to use the black cartridge instead of the color. If either one of these solutions solves your problem, it means your color cartridge needs to be cleaned or replaced. If you feel that the color cartridge should not be out of ink please try the following:
1. Go to the "Lexmark solution center." This can be done by clicking on "Start," go to "Programs" and Lexmark printer group. Click on the "Lexmark Solution center." Next click on the "Maintenance" Tab.
2. Select "Clean and Fix Horizontal streaks." This will produce a printed page.
The colors that you should see here are black, yellow, magenta (a reddish purple) and cyan (a dark sky blue). You should notice the diagonal lines above and below the solid horizontal lines. These diagonal lines should be solid from left to right with no gaps.
If there are gaps in the lines or the print diminishes across the page, you should run the "Clean Print Nozzle" page a couple more times to try and clear it up. If you still have gaps at the top and bottom, you should "wick" the cartridges by following the steps given below:
1. Please open the "Solution center" again and go to the "Maintenance" Tab.
2. Select "Install color/black cartridge" and remove the cartridge or cartridges from the printer.
3. Get a damp paper towel.
4. Set the ink cartridge right side up on the damp paper towel so that the ink nozzles are against the towel and hold the cartridge in this position for about 15 seconds.
5. Now wipe the print head (on the bottom where the ink comes out) across in one direction only (left to right) until it looks clean.
6. Next dab the cartridge on the towel to make sure that the ink is flowing.
7. Snap the cartridges back into the printer.
8. On your computer, select "Old Cartridge install."
9. Repeat the "Clean Nozzle Page" one more time. If this fails to address the problem the entire procedure may need repeating.

Shake the toner cartridge left to right, then try.

To replace the print cartridges
1. Make sure the HP All-in-One is on.
Caution If the HP All-in-One is off when you lift the print-carriage access
door to access the print cartridges, the HP All-in-One will not release the
cartridges for changing. You might damage the HP All-in-One if the print
cartridges are not docked safely on the right side when you try to remove
them.
2. Make sure the paper tray is down and there is letter or A4 unused plain white
paper loaded in the paper tray.
3. Open the print-carriage access door by lowering the door.
The print carriage moves to the far right side of the HP All-in-One.
4. Wait until the print carriage is idle and silent, and then, using your thumb, lightly press down on a print cartridge to release it.
If you are replacing the tri-color print cartridge, remove the print cartridge from the slot on the left.
If you are replacing the black or photo print cartridge, remove the print cartridge
from the slot on the right.
5. Pull the print cartridge toward you out of its slot.in-One
6. If you are removing the black print cartridge in order to install the photo print
cartridge, store the black print cartridge in the print cartridge protector.
7. Remove the new print cartridge from its packaging and, being careful to touch
only the black plastic, gently remove the plastic tape by using the pink pull tab.
8. Slide the new print cartridge forward at a slight upward angle into the empty slot.
Using your index finger, push the print cartridge forward until it clicks into place.
If the print cartridge you are installing has a white triangle on its label, slide the
print cartridge into the slot on the left. The label for the slot is green with a solid
white triangle.
If the print cartridge you are installing has a white square or a white pentagon on
its label, slide the print cartridge into the slot on the right. The label for the slot is black with a solid white square and a solid white pentagon.your HP All-in-One
9. Close the print-carriage access door.
If you are installing a new print cartridge, the HP All-in-One begins to print a print cartridge alignment sheet.
10. Load the print cartridge alignment sheet on the right front corner of the glass with the top of the page to the right.
11. Press the Start Scan button.
The HP All-in-One aligns the print cartridges.

Good Luck.

You just might have a faulty black toner cartridge think back did the problem arise when you installed the new black cartridge. Also is the toner a original if not change for a original.

Hope this Helps
Thanks J

could be, but first take out the cartridge then look inside the unit there is a black roller, kind of spongy or hard rubber, is the black part towards the right? grab it and give it a tug and see if you can SLIDE it to the left if so then it needs to be replaced, that is your problem.

 

It could also be the fuser, are the copies on the left coming out smudged or with a grainy shadow? then it's the fuser.