My officejet pro 8500A prints black vertical lines down the page when I make a copy. I have cleaned and aligned the printheads. What else can I do?

try unplugging it for awhile

that might be your printing settings and laptop file formate

Run the "clean inkjets" routine followed by test pages until printout appears correct. Maybe the print cartridges are defective.

Hi, Try using this link for print quality issues from HP http://h10025.www1.hp.com/ewfrf/wc/document?docname=c01980797&cc=us&dlc=en&lc=en&product=3752456&tmp_track_link=ot_search

Hi, Change first black color print head cartridge just open cover then replace black print head cartridge.close cover wait for ink cartridge reinitialize if ready print test again.if same print having black line all copy needs to replace also black ink cartridge.

lift up the feeder on top of machine where your big piece of glass is. to the side of that big glass is a small glass about an inch wide. most likely there is something on it. clean and you should be good to go.

razors

when feeder is used for scan, fax or copy, a black vertical line appears on the left side of page

Never mix dye and pigment inks/machines Head could be screwed Try copying many black text only pages up to 200 but run head clean after 50 or so Inkypete

Press "set up" button until number 6
Number 6 is "tools"
press OK
press forward arrow (to right of ok button)
No.2 is clean printhead
No.3 is align printer
No.4 is calibrate line feed

Step one: Retry the print job The problem may occur only rarely. If you have not seen it in other printouts, try again. Step two: Increase the print quality mode If reprinting did not help, try increasing the print quality mode.

1. In the application you are printing from, click File , and then click Print .
2. Make sure the printer is selected, and then click Properties .
3. Select the Paper/Quality tab.
4. In the Print Quality area, choose the next higher quality setting. If the current setting is Draft, choose Normal. If the current setting is Normal, choose Best.

Step three: Print in grayscale (black area streaking only) If the streaks are in a black area of a black and white printout, change to grayscale printing. NOTE: This step does not apply to color printouts.

1. In the application you are printing from, click File , and then click Print .
2. Make sure the printer is selected and click Properties .
3. Click the Color tab, and select Print Grayscale and High Quality .

Step four: Clean the printheads If the print quality is still bad, clean the printheads.

1. Make sure the printer is loaded with unused white paper.
2. Open HP Solution Center .
3. Click Settings , Print Settings , and then select Printer Toolbox .
4. Click the Service Tab .
5. Click Clean Printhead , and then click Clean .

Step five: Align the printheads If the print quality is still bad, align the printheads.

1. Make sure the printer is loaded with unused white paper.
2. Open the printer Toolbox , and select the Printer Services tab.
3. Click Align Printheads . The Align Printheads window opens. Click Align .
4. The printer prints an alignment page. The lines in the patterns should appear to be straight. Click OK when the page finishes printing.

Step six: Calibrate the linefeed If the print quality is still bad, calibrate the linefeed:

1. Make sure the printer is loaded with unused white paper.
2. Open the printer Toolbox and select the Printer Services tab.
3. Click Calibrate Advanced Linefeed . The Advanced Linefeed Calibration window opens. Click OK .

Step seven: Replace one or both printheads If the print quality is still bad after performing all the above steps, one or both of the printheads will have to be replaced. Print a PQ Diagnostic page to see which printhead should be replaced.

1. Make sure the printer is loaded with unused white paper.
2. Press the Setup button.
3. Press 1 and * simultaneously.
4. Look at the color blocks labeled Test Pattern 2. Some or all of them could show white horizontal streaks. If none of the blocks are streaked, the printheads are okay.
   • If the Black block has lines – replace the KY printhead.
   • If the Cyan block has lines – replace the MC printhead.
   • If the Magenta block has lines – replace the MC printhead.
   • If the Red block has lines – replace the KY printhead.
   • If the Green block has lines – replace the KY printhead.