printed page has blank lines every 1.25 inches

[TMadge]

Problem began after removing jamed page(s).

Different ink cartridges have same result.

[sandytechy20]

@TMadge

Welcome to the HP Forums, this is a great location to get assistance! I read your post and see that your HP Envy 7645 Printer prints blank lines after clearing jammed papers. I would like to help you resolve this issue. 

To assist you with accurate information I would require more information regarding this.

• Did you do any changes to the printer after removing the jammed papers?
• Are you getting verticle lines are horizontal lines while printing?

Meanwhile

Print a Print Quality Diagnostic report

1. Load U.S. Letter or A4 size, unused, plain white paper into the input tray.

2. On the printer control panel, swipe the display to the left, and then touch Setup (). The Setup menu displays.

3. Touch Reports, and then touch Print Quality Report. A Print Quality Diagnostic page prints.

Figure : Example of a Print Quality Diagnostic report with no defects

Figure : Example of a Print Quality Diagnostic report with defects

If it prints vertical lines on it, try the below steps

Clean the cartridges

1. Load U.S. Letter or A4 size, unused, plain white paper into the input tray.

2. On the printer control panel, swipe the display to the left, and then touch Setup (). The Setup menu displays.

3. Swipe the display up, and then touch Printer Maintenance.

4. Touch Clean Cartridges. A Print Quality Diagnostic report prints.

5. Examine the Print Quality Diagnostic report.

Align the printer

1. Load U.S. Letter or A4 size, unused, plain white paper into the input tray.

2. On the printer control panel, swipe the display to the left, and then touch Setup (). The Setup menu displays.

3. Swipe the display down, and then touch Printer Maintenance.

4. Touch Align Printer.

5. After the printer prints the alignment page, touch OK, and then recycle or discard the alignment page.

6. Print another Print Quality Diagnostic report to see if the issue is resolved.

Click here and refer the HP Document for more assistance.

Let me know if that helps.

Cheers.

[TMadge]

I cleared the jam by opening up unit, removing  10" cover with handle and removed jammed paper by pulling back & up. Paper seemed to be stuck on last set of rollers and too some force to release. Next few pages also jammed. I turned off printer, changed paper and printing went through EXCEPT for the horizontal blank lines.lines

[KrazyToad]

Hi @TMadge

It looks like you were interacting with sandytechy20, but he is out for the day & I'll be glad to help you out. I'm KrazyToad & I'm at your service.

I have gone through the entire conversation and I see that the Diagnostic Page has the same issue.

I would request you to contact our Phone Support for Service Options

Step 1. Open link: www.hp.com/contacthp/
Step 2. Enter Product number or select to auto detect 
Step 3. Scroll down to "Still need help? Complete the form to select your contact options"
Step 4. Scroll down and click: HP contact options - click on Get phone number and phone number appear.

Thank you. 🙂

If the information I've provided was helpful, give us some reinforcement by clicking the "Solution Accepted" and "Kudos" Buttons.
 

[WarrenLaveniuk]

I have this same issue. 

Is there any resolution to this?

[sfadvance]

We are seeing our new HP Officejet Pro 8740 randomly leave blank areas on a printed page I called HP support and they seem to think it is a windows 10 problem.  Odd it is randomly happening no matter what software we print from.  Any fix for this?  We have updated the driver and cleaned the print heads

[kevin-t]

Hello,

Thank you for posting in this thread. Unfortunately based on when the last response was made, I have closed this thread to help keep comments current and up to date. We recommend starting a new thread for your issue by clicking here.
To be more helpful with your post, you can add key information if you desire: 
1. Product Name and Number (please do not post Serial Number)
• Example: HP Pavilion DV2-1209AX or HP Deskjet 3000 Printer CH393A
2. Operating System installed (if applicable)
• Example: Windows XP, Windows Vista 32-bit, Windows 7 64-bit
3. Error message (if any)
• Example: ""Low disk space"" error in Windows
4. Any changes made to your system before the issue occurred
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If you have any other questions about posting in the community, please feel free to send me a private message!

Thank you