<div>
That was it! I'm so glad it was such an easy fix. Thank you for your quick response!
</div>


That was it! I'm so glad it was such an easy fix. Thank you for your quick response!

<div>
<div class="content wysiwyg-content">
I'm getting a thin black line down the middle of every page I copy through the ADF on my LaserJet Pro 400 MFP M425dn. It's a solid line, clean, without smudges. I've just replaced all of the rollers in that part of the printer. I do NOT get a line when I copy a page on the flatbed and avoid the ADF. What else could be creating this line in the ADF that I could be missing? <br />
<br />
Thanks very much
</div>
</div>


I'm getting a thin black line down the middle of every page I copy through the ADF on my LaserJet Pro 400 MFP M425dn. It's a solid line, clean, without smudges. I've just replaced all of the rollers in that part of the printer. I do NOT get a line when I copy a page on the flatbed and avoid the ADF. What else could be creating this line in the ADF that I could be missing? 

Thanks very much

Thin black line down MFP Copier in ADF only

A printer is a peripheral which makes a persistent human readable representation of graphics or text on paper or similar physical media. Traditional printers are being used more for special purposes, like printing photographs or artwork, and are no longer a must-have peripheral; 3D printing has become an area of intense interest, allowing the creation of physical objects. An image scanner is a device that optically scans images, printed text, handwriting, or an object, and converts it to a digital image. Hand-held scanners, where the device is moved by hand, have evolved from text scanning "wands" to 3D scanners used for industrial design, reverse engineering, test and measurement, orthotics, gaming and other applications.