HP Officejet Pro 6978 unable to scan, "connection unsuccessful"

[Diana0216]

HP Officejet Pro 6978 unable to scan, "connection unsuccessful".  It should work wireless, but it will only print with a USB cable.  So it prints but won't scan.  I turned on and off, unplugged, uninstalled, reinstalled.  Not only should this work wireless, but definitely plugged in.

[sandytechy20]

@Diana0216

Welcome to the HP support community.

I understand that you are getting scanning issues, follow these steps to fix the issue.

Check Windows Image Acquisition settings

Windows Image Acquisition (WIA) is a Windows service that helps communication between the computer and scanners. If WIA is not activated, scan jobs can fail.

• 1. In Windows, search for and open View local services.

• 2. In the Services window, scroll down the list and find Windows Image Acquisition (WIA) .

• 3. Look at the Status and Startup Type values.

  • If the status is Started or Running and the Startup Type is Automatic, WIA is running correctly. Skip to the next step.

    

  • If the status is Disabled or no status displays, right-click Windows Image Acquisition (WIA), click Properties, click the General tab, select Automatic from the Startup type dropdown menu, and then click Start.

    If the Start button is grayed out, go back to the Services menu, make sure Remote Procedure Call, Shell Hardware Detection, RPC Endpoint Mapper, and DCOM Server Process Launcher are running and set as Automatic, and then start WIA.\

  • Try to scan.

Refer to this HP document for more assistance:- Click here

Let me know how it goes.

To thank me for my efforts to help you, please mark my post as an accepted solution so that it benefits several others.

Cheers.