My HP Officejet Pro 6978 quit printing envelopes. I have tried every size in the menu.

[SS_TAC]

I have been able to print envelopes automatically with this printer. In other words, I could

print a letter and then put in an envelope without changing anything on the menu and it would

print envelopes.  All of a sudden, yesterday, when I wanted to print an envelope, I get an error

message on the printer that the size of the envelope does not match. 

I am using a standard Monarch size Executive envelope.  I tried every single envelope size

on the menu and it didn't recognize any of them.  I have only had this printer since June. I am having another problem.

Since then it keeps "falling offline".  During daily use, the printer will somehow disappear from

my hardware.  I would install it again.  It works for a while and then it happens again. Right now, the printer

is online, working to print letters but not envelopes.  Please help.  My office tech person cannot figure this out.

[Raj1788]

@SS_TAC

Use HP Print and Scan Doctor to check connectivity

Download a special version of HP Print and Scan Doctor.

1. Download HP Print and Scan Doctor.

2. Run HPPSdr.exe from the download location on your computer.

3. Once HP Print and Scan Doctor opens, click Start, and then select your printer.

   • If your printer is not in the list, turn it off and on and then click Retry.

   • If there is a connection problem, follow the instructions in HP Print and Scan Doctor.

4. If a screen prompts you to turn on printer updates, click Yes.

5. If a screen prompts you to make your printer the default printer, click Yes.

If the issue persists, Delete the driver at the root level and Install the drivers, follow the steps below:

Remove the USB if connected

1.) In Windows, search for and open Programs and features 

2.) Select your HP Printer 

3.) Select Uninstall 

4.) In Windows, search for and open Devices and printers 

5.) In the Devices and Printers windows look for your HP printer. If you see it listed right-click on it and choose `Delete' or `Remove Device' 

6.) Open up the run command with the "Windows key + R" key combo. 

7.) Type printui.exe /s and click Ok. (Note: there is a space in between "printui.exe" and "/s") 

8.) Click on the "Drivers" tab 

9.) Look for HP Printer driver. If you see it Click on it and click Remove at the bottom 

10.) Select Ok

11.) Select Apply and Ok on the Print Server Properties windows

12.) Close Devices and Printers 

Then, Click on this link: https://support.hp.com/us-en/drivers/selfservice/swdetails/hp-officejet-pro-6970-all-in-one-printer-... to download and install the Full Feature Software and Drivers.

Assign Manual IP to the printer:

1) Print a Network configuration page from the printer's control panel. 

2) Look for IP address from the Network configuration page. 

3) Open a web browser - Chrome or IE or any other browser that you are using. 

4) Type the IP address mentioned on Network configuration page into the browser's address bar or URL bar and press enter button. 

5) Go to the Network tab. 

6) Click on Networking from the left pane. 

7) Then click on Network Address (IP). 

8.) Click on Manual IP Address and go to suggest a Manual IP. 

9) Scroll down the screen and select Manual DNS server. 

10) Enter the Primary and secondary DNS server from the Network Configuration page into the Manual Preferred DNS server field. 

11) Click on Apply. 

Refer to the video link for step by step instructions - https://www.youtube.com/watch?v=SCnYyq80V9g 

Note: The video is for win 8 but steps are similar for other operating systems as well. You need to enter the IP address in the browser's URL or the address bar to access the printer page.

Keep me posted, how it goes!

If the information I've provided was helpful, give us some reinforcement by clicking the Accepted Solution and Kudos buttons, that'll help us and others see that we've got the answers!

Thank you for joining the HP Community.

Have a great day!

Cheers:)

[SS_TAC]

 Thank you, we will give it a try!

Shelley

[Raj1788]

@SS_TAC

Keep me posted, how it goes!

Have a great day!

Cheers 🙂