Print quality problems- Horizontal line

[MarkTr]

I have an HP officejet pro 7740, just bought it 6 weeks ago. printing quality was fine until this week.  then started seeing horizontal lines across the page.  I cleaned the head several times,  plus i did printer realignment mechanism on the menu.  not much has changed.   how do i fix???

[Jeet_singh]

Hi @MarkTr,

Welcome to HP Forums, this is a great place to get support, find answers and tips, Thank you for posting your query, I'll be more than glad to help you out 🙂

I understand you are having print quality issues while printing on your HP OfficeJet 7740 printer. I'll be really glad to help you with this,

Please make sure that the printer is connected directly to the wall outlet and not to the surge protector.

Remove all the ink cartridges and then try to perform a hard reset on the printer.

With the printer turned on, disconnect the power cord from the rear of the printer and also unplug the power cord from the wall outlet.

Remove USB cable, if present.

Wait for 2-3 minutes, press and hold the power button on your printer for about 30 seconds to remove any additional charge.

Now plug back the power cable straight to a wall outlet without any surge protector or an extension cord and then plug back the power cord to the printer.

Turn on the printer and wait till warm-up period finishes and the printer is idle.

Now insert the ink cartridges and then try to print a test page and check if it works.

Let’s first try and make a “photocopy” to determine whether the issue is with the printer or not. Place a document on the scanner glass and choose “Copy” option. If the printer is making a good copy, then the printer hardware is fine.

For more details, please follow the steps suggested in the support document for - Fixing Poor Print Quality - Click here

Please respond to this post with the result of your troubleshooting. I look forward to hearing from you. 

If you wish to help others looking for the same solution as you've found, mark the post as Accepted Solution.

If you wish to show appreciation for my effort, please click the Thumbs up icon at the bottom of my comment.

And I Hope you have a good day, Ahead.

Regards,

[MarkTr]

hi there,  thanks for the help, unfortunately i am still getting fine lines across the page.   could it be anything else?   mark

[Jeet_singh]

Hi @MarkTr,

Thank you for replying,

As I understand you are still getting fine lines across the page, don't worry I'll try to help you with this,

Just wanted to check if you have tried printing the Print quality report and did it print fine or did it come with any defects, If you haven't tried it please perform the steps suggested and get back to us with the results for further assistance.

If you have followed all the steps suggested and still having the issue, I would personally suggest this could be a printer hardware. I would recommend you contact our HP phone support for available service options. Please fill in the product details to get the tech support number.

Please use the following link to create yourself a case number, then call and it may help speed up the call process:

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 numberCase number and phone number appear.

They will be happy to assist you immediately.

Keep me posted for any other assistance,

If the information I've provided was helpful,

give us some reinforcement by clicking the solution and kudos buttons,

that'll help us and others see that we've got the answers!

Good Luck.