Question about HP ScanJet 2400 Flatbed Scanner

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A thread like line on the mirror

A thread like line appear on the mirror of the scanner. Thats why when i am scanning the impression of this thread like lines coming on the scaned file. Plz help me to solve the problem.
Thank u.

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Re: a thread like line on the mirror

When u r helping me then help me totaly. Tell me how to remove glass to clean back side. thanx.

Posted on Jan 26, 2008

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Re: a thread like line on the mirror

Can u confirm that is it a thread or a scratch like a thread,u better clean the glass from both side n see,if u want any help like how to do that pls let me know

Posted on Jan 25, 2008

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Right side of document is black when scanning to print, umax 1220u

1. Fred's right about trying another computer, but you still may have wrong/ old driver- download demo version of Vuescan at and see if it's your software.
2. Partially blank pages can appear when you don't have sufficient memory for the scan, but that usuall loosees the lower half of the page.
3. The lamp is probably not the problem, because there is enough liht bouncing around in mostflatbead scanners that you would just see the image "fade"to black, not have a distinct line.
4. best bet is that something inside has come loose and is covering half the scanning sensor, or the mirrors that reflect the images to the sensor inside

Dec 24, 2012 | Umax Astra 1220U Flatbed Scanner

1 Answer


There are two possibilities: 1) The scanner sensor has a dead pixel, or 2) There is a particle covering a pixel of the linear scanning sensor array.

If you are up to it, open the scanner carefully and clean all the optics while you are at it. So the back of the glass cover, the mirrors (carefully!) and then the sensor. You may want to use a duster spray can (I think Office Max or Depot carry those) and dust of the sensor and the mirrors instead of using a soft cloth. If the scanner uses first surface mirrors, then one can very easily ruin the mirror coatings and it will be full of scratches from the dust particles when you wipe them! If they use regular mirrors (where the reflective coating is behind the glass) then it is safe to use a cloth.

If that does not get rid of the black line, then you have a dead pixel in your scanner sensor and you need to buy a new one.

There may be a way to tell whether it is a dead pixel or a dirt particle on the sensor. If you open your scanned image (or plain white paper image), magnify the image and see if the line is exactly one pixel wide - that would point to a dead pixel. If it is more than one pixel wide and the scanner did not do an interpolation then it is a dirty sensor. To make sure, scan with the maximum intrinsic resolution (chek the scanner's manual for that), so you don't interpolate between pixels. I am still not sure if that also applies to color scanners, they have a color filter over the linear detector array. It may depend on how the pixels for the color coding are arranged. But then I would expect an 'off-color' line, not a black line. If it is a black line and if it is more than one pixel wide, I am sure that a dust particle is the reason for it.

Good luck, Stephan

Mar 25, 2011 | Xerox DOCUMATE 510 Flatbed Scanner

1 Answer

Hi a vertical line is in image scanned please tell me how to solve this problem thanks

The lines are due to dirty scanner mirror. The printer/ scanner design is based Sheet-Fed Scanner. Open/Lift the scanner top (by pullung it near the area where you feed the paper to scan). Look out for the horizontal mirror and use a soft, damp, lint-free cloth to gently clean the scanner mirror, rollers etc. and enjoy clear scanning!

Good Luck!
Hope this helps! Dont forget to appreciate the solution!!

Feb 14, 2011 | Fujitsu fi-5120C

1 Answer


mirrors underneath the glass are dirty or "fogged up" . Remove the glass if possible and clean the mirrors carefully with q-tips.

Dec 25, 2010 | HP ScanJet 2300C Flatbed Scanner

1 Answer

Lines across scan

It appears to be a freak problem. The best way is to bring it to original condition. Try uninstalling the scanner, run Scandisk on the Comp, Switch off and reinstall the driver. this may work.
S. Mohan

Feb 12, 2009 | Microtek ScanMaker 9800XL Flatbed Scanner

1 Answer

Poor scanned image quality

yes u can repair this try to remove the cover clean up the white tiles which reflect the image, also unscrew it and clean up the mirror and lens

Sep 08, 2008 | Microtek scanmaker 3840

1 Answer

Yellow Streak on Images

I took the scanner apart. Then using a dampened eyeglass cleaning cloth, I gently cleaned the 3 internal mirrors.
No more yellow streak! :)

May 27, 2008 | Microtek ScanMaker 3800 Flatbed Scanner

1 Answer

Problem in scanned work

The Reflective Mirror Set in the scanner were subjected to dust. Clean the Mirrors (wipe the Dust with a soft hair 1 inch Brush. Do it under an Expert's Supervision

Dec 02, 2007 | HP ScanJet 3200C Flatbed Scanner

2 Answers

Kodak i260 problem

A line appears if a dust particle on the scanner glass is scanned continuously. Clena the galss with Isopropyl alcohol, dont use any solvent. If the line persists even after this, there could be some sensor problem. If accidentally a paper with a staple pin is inserted, the pin can cause scratch and a line will appear.

S. Mohan

Aug 08, 2007 | Kodak I260 Captiva IA-Express Path-Through...

1 Answer

Epson 1640 SU problem, faint yellow line while scanning

Perhaps this: the scanner calibrates itself on a white strip above the place where the lamp is in rest. When there is a spot on that white strip, the scanner wil use the retreived information for the whole scan, resulting in a line on your scan.

Aug 13, 2006 | Epson Perfection 1640SU Flatbed Scanner

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