Undefined black line vertically on printed page

A narrow undefined line appears about two inches from the left edge of a page (and not totally consistent in how dark it is. Very faint if no print on the page.   The more text the more noticable it appears.
Additionally -- if there is heavy toner in that area it appears to remove the toner leaving a white but dirty narrow line.   But if it's just regular printed text it does *not* score thru a letter, it just appears as this dirty line in the background.
It's not the cartridge.     Can't see anything inside the printer that looks likely.

Hello sam_k, welcome to the forums
I understand you are noticing a black line. Please let me know some more information and I will certainly look into this for you!
1. Which Operating System you are running:
Which Windows Operating System am I running?
Mac OS X: How Do I Find Which Mac OS X Version Is on My Computer?
2. What is your printers Model Number:
How Do I Find My Model Number?
3. Do you noticed the black line when you print, scan, copy, or fax?
4. How is your printer connected to your PC? Ethernet, wireless or USB?
In the meantime, try Resetting the Printer and plug the printer in directly to the wall outlet, avoiding power bars and surge protectors. This ensures the printer is receiving full power and may help this situation.
Thank you! Have a great day
R a i n b o w 7000I work on behalf of HP
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This is not normal. You should return the defective iPad to Apple. To learn more about Apple's return policy, visit http://store.apple.com/us/help/returns_refund
Hope I helped,
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Hi folks,
I have an LaserJet 4250n that's putting vertical light black smudges/lines down the center of my pages. It's all the way down, but it gets lighter at certain points and picks back up again. I've tried replacing the toner cartridge and cleaning the rollers, to no avail.
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View Solution.

Hi James,
I am a printer technician for HP in Australia and a full time employee. I look after many printers including this one.
Lines down the page can be caused by a few things - depending on what the line looks like.
If it is a smudged dirty streaky mark continously down the page, you migh have a dirty fuser - it may have been picking up toner and it has built up and then put it back down on the paper.
A thin defined black line might be a scratched drum or developer - the laser might be refracting and drawing the defect onto the drum.
Blank or white lines could be something stopping the toner from getting to the paper - transfer roller under the toner might have something stuck on it.
A repeated mark or defect could also be a dirty fuser - glue or wax from envelopes and labels could do this.
Try swapping the toner with another to test - borrow one if you can.
Run 3 or 4 cleaning pages - in the menu, configure device, print quality menu, create/process cleaning page.
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If you can get to another 4250 or 4350 you could borrow the fuser and find out.
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I owned an HP Officejet Pro 8500 and scanning was perfect. I recently purchased an HP Officejet Pro 8600 Plus.
When I scan from the HP 8600 auto document feeder, I get a thin (several pixel wide) black line along the bottom edge of the resulting scan. This line will sometimes be slighly crooked or only appear across half the page, in which case it tends to get thicker toward the edge of the page). I believe this line is an artifact from scanning the very bottom edge of the oroginal document. I think it is showing where the bottom edge of the page was when scanned. If the document is a little skewed, then the black line at the bottom will be a little crooked, probably following the edge of the page. This problem is consistent, and repeatable. It happens in both "Scan To E-mail" mode and "Scan To Network Folder" mode.
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View Solution.

I find it interesting that the issue happens across both printers. This is what leads me to believe this is something with the software/connection with the PC. One thing I will note is that you mentioned above using Adobe Reader 10.1.6. The latest version of Adobe Reader is 11.0.02. I would advise removing your current version of Adobe Reader and install the latest version.
I am not sure if this will fix the issue as you mentioned the line comes across in jpeg and other scanning styles. Do you possibly have another PC you could try setting up a connection with quickly and attempting a scan? This would be another way to ensure if the issue is coming from the printer or a connection/software issue.
I would like to make sure the issue is coming from the scanners on these printers before returning the printers as I would hate for you to get another model printer and the issue remain with this printer as well. However, I will note that the Laserjet Pro 200 is a nice series printer from my experience. I have used the Laserjet Pro 200 black and white only edition, the MFP, and the TopShot edition where I am located.
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This forum is focused on consumer level products. For the Designjet you may have better results posting in the HP Designjet forum here.
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If my answer was helpful please click the "Thumbs Up" to say "Thank You"--V

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Give Kudos to say "thanks" by clicking on the "thumps Up icon" .
Click "Accept as Solution" if it solved your problem, so others can find it.
Although I am an HP employee, I am speaking for myself and not for HP.

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Please click “Accept as Solution” if you feel my post solved your issue, it will help others find the solution.
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Thanks for the tip Mikey - however the same thing happens with the thin black lines when I print on 'normal' A3 paper too. On normal A4 paper it's fine, no lines, but when I print to A3 I get the lines - on both kinds of paper.
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Thanks for the tip Mikey - however the same thing happens with the thin black lines when I print on 'normal' A3 paper too. On normal A4 paper it's fine, no lines, but when I print to A3 I get the lines - on both kinds of paper.
I've attached a couple of (awful-looking) scans to help illustrate my point.

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Undefined black line vertically on printed page

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