Vertical line printed length of page

Try replacing color toner of the same color that are the lines.If the void was in the same place all of the time then I would say use a Q tip dipped in 90 proof alcohol and clean laser.

have you ran a test page , the test will take about 30 sheets of paper it will test everything and will correct itself
good luck

Sounds like its time for a new drum/print cartridge. When it get worn you start to get poor quality prints and sometimes lines. COule also be scratched and transfering the line on the prints but in either case needs to be replaced.

From the service manual:


Vertical lines or streaks

Check for a leak where light might be entering the printer.

Check for circumferential scars on the photosensitive drum. If scars are present, replace the
drum cartridge if the line goes through all colors.

Check for circumferential scars on the upper fusing roller. If scars are present, replace the upper
fusing roller if the line goes through all colors.

Remove the imaging drum and inspect main charger or imaging drum for a contaminant, such as
a fiber, if the line goes through all colors.
CAUTION Do not expose the imaging drum to light for more than 15 seconds. The drum is light sensitive, and
exposure to light can cause permanent damage.
Vertical black lines

The toner cartridge is defective.

The toner cartridge is not seated properly.

The fuser entrance is dirty.

The fuser has scratches on it.

This might be a repetitive defect. If so, the lines will repeat at a consistent interval down the page.

The printer needs to be cleaned.

There is a problem in the heating element.
Vertical white lines

If white lines or streaks appear only in the black areas of the printed media, print several
configuration pages to clear the anomaly. If this does not clear the problem, check the sleeve
surface to confirm the defect, then replace the black toner cartridge.

If white lines appear only in a particular color, try printing several configuration pages to clear the
error. If the error does not clear, check the sleeve surface to confirm the defect, then replace the
defective toner cartridge.

There is a lack of toner or the toner cartridge is faulty.

There is dirt in the laser path.

The fuser is defective.

A mirror in the laser scanner is dirty.

Seem like blocked hole(s) on the color print head...
Most likely if there is a deep clean option then do it (may need a few times to unblock a hole or never).
Also get the printer physically cleaned up if you can see dusts inside (vrtical lines on color bars).

Colour printing is ok? Replace black PCU.

Hi morshi. I found a potential solution to your problem with your 5610 printing vertical lines at HP.com:

Vertical black lines or streaks

It's hard to tell from the rest of your message what other problems you're describing. I did find a troubleshooting page at HP that shows how to address general print quality problems:

Problem with quality of copies

If those links don't solve all of your problems, the Color printing issues page for the 5610 at HP has numerous other solutions:

Color printing issues

I know the name of that last link may seem misleading since you haven't described color printing issues, but the links on that page offer different general print problems and their solutions.

Good luck.

Select the Jet Substitution Mode.

1. On the Control Panel, select Troubleshooting, and then press the OK button.
   
2. Select Print Quality Problems, and then press the OK button.
   
3. Select Eliminate Light Stripes, and then press the OK button.
   
4. Select Jet Substitution Mode, and then press the OK button.
   
5. Follow the Control Panel prompts to select the color and malfunctioning jet number indicated on the Light Stripes Test page.
   

If the lines are blue, check the color PCU.

Hey Chuck, Any chance you can post a scan of one of the faulty pages ? This will make it easier to assess the fault. Print off about 10 pages of a page that is affected by the lines. Look at each page and see if you can detect a recurring pattern over any of the pages. If there is a pattern, chances are it is probably the PCU that is marked.