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Note: From May 1, 2024, the HP Scan and Capture app will no longer be available (retired) in the Microsoft Store and HP will not release any further app updates. Alternatively, you can download HP Smart from the Microsoft Store. For more information on how to set up your printer using the HP Smart app, go to HP printer setup (HP Smart app).
Common problems HP Solution Center not working : Adobe Flash Player Error and Unable to scan
We would like to share some of the most frequently asked questions about HP Solution Center not working : Adobe Flash Player Error and Unable to Scan.
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‎03-28-2025 01:46 PM

HP Recommended
Product: HP OfficeJet Pro 7740 Wide Format All-in-One Printer
Operating System: Microsoft Windows 11

There is a vertical line on scanned documents using the ADF. No line if I use the flatbed. I have cleaned the glass I understand the ADF uses and still have the problem

1 ACCEPTED SOLUTION

Accepted Solutions

‎03-30-2025 02:35 PM

HP Recommended

The glass must be cleaned here:

Andr1611_0-1743366845193.pngAndr1611_1-1743366870601.png

That's a very small spot!

 

Kind Regards
Andr-1611

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View solution in original post

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12 REPLIES 12

‎03-28-2025 02:17 PM

HP Recommended

Hello CalgaryYukon ,
Welcome to the HP Support Community!

 

This glass surface must be thoroughly cleaned.

Andr1611_0-1743193033757.png

Kind Regards
Andr-1611

If my post resolved your problem please mark this post as an "Accepted Solution".
Or click on the YES button to reply that the response was helpful and/or to say “Thank You”.

I'm not an employee of HP, I'm as volunteer here.
        
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‎03-28-2025 06:23 PM

HP Recommended

Thank you for your help. I think I have cleaned all the visible glass surfaces on the lid and on the main printer part. I  only get the vertical lines when I use the ADF, not when I use the glass scanner manually. Any suggestions?

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‎03-29-2025 12:12 AM

HP Recommended

Even nearly invisible scratches can distort the scanner and cause lines. the best way to check for these minor defects or debris is to use a very bright flashlight and look at the glass from a low angle. 

If you find the information provided useful or solves your problems, help other users find the solution easier by marking my post as an accepted solution. Clicking "yes" on "was this reply helpful" also increases the chances that this solution will help others.
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‎03-29-2025 09:15 AM

HP Recommended

Hi @CalgaryYukon ,

 

take a look at this solution here: Printer Maintance 
A magnifying glass and a flashlight are very helpful.

 

Kind Regards
Andr-1611

If my post resolved your problem please mark this post as an "Accepted Solution".
Or click on the YES button to reply that the response was helpful and/or to say “Thank You”.

I'm not an employee of HP, I'm as volunteer here.
        
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‎03-29-2025 11:13 AM

HP Recommended

Got the flashlight out and had a close look. Still have the line. The line issue started when I used the ADF while I had a document on the glass. The ADF fed the new document over the document on the glass. Since then, the line remains. Will get a magnifying glass as it is a lower cost option than a new printer. My 7740 has been a reliable beast for many years and is costly to replace. Plus I have a bunch of ink for it, about $300. Will shop for a printer that uses the same ink.

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‎03-29-2025 01:26 PM

HP Recommended

OK,

 

but please scan a blank A4 sheet via the ADF first, as described in the link above, and then upload it here.

 

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‎03-30-2025 01:33 AM

HP Recommended

How do I upload here?

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‎03-30-2025 05:52 AM

HP Recommended

@CalgaryYukon 

  1. Scan a blank A4 sheet (at 300 dpi) and save as a jpeg.
  2. upload it here, click on the icon "Insert photos"
  3. then "choose a files"
  4. select the file with the extension: jpeg
  5. click "Done"

 

I'm not an employee of HP, I'm as volunteer here.
        
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‎03-30-2025 11:07 AM

HP Recommended

Calgary Yukon Blank page scan.jpg

 

Calgary Yukon Blank page scan.jpg

 I think I uploaded the file but do not see it. I dragged and dropped the file. Is that how to do it?

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