HP Envy 4520 No longer scans TWAIN Problem

[Atherworld]

My problems tarted when my HP4520 spontaneously updated. I lost the ability to print in color form my computer to my HP 4650 (Yes, I had 2 HP's installed on my computer). I tried to reinstall 4650, ran into some problems at the end. Everythign worked fine Monday But today, Thursday, My 4520 no longer scans. Some kind of TWAIN problem. HP scan ans Print Doctor was useless.  It said Scanner was fine.  When I still tried to fix it, it said it couldn't open a cab file.  Scanning on the 4520 itself also fails (form the touch screen panel). Says  no computer found. HP Smart only lists my 4650. It refuses to even find my 4520. Of course, hp.123.com is useless for connecting a printer as it requires HP Smart (which isn't very smart).  I use a USB connection. Wireless is not possible. It never worked.

I'm on a Dell XPS 8930 desktop with WIn10 Home 64.

[TEJ1602 · Accepted solution]

@Atherworld, Welcome to HP Support Community!

Follow the steps below to isolate and resolve the issue-

Update the printer firmware

Download available firmware updates from the HP website

With the printer on and connected to the computer, go to HP Customer Support - Software and Driver Downloads, and then identify your printer. Look for and install any available firmware updates. Refer to the document HP Printers - Updating or Upgrading Printer Firmware

I recommend you delete the driver and root level and retry, follow the steps below: 

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”

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.

Use this link to download and install the new driver. Configure the printer and try scanning.

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.
4. 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.

Hope this helps! Keep me posted. 

Please click “Accepted Solution” if you feel my post solved your issue, it will help others find the solution. Click the “Kudos/Thumbs Up" on the bottom right to say “Thanks” for helping!

[Atherworld]

Yes, that worked.  I can scan again.