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HP Printers - Scanner not found or connected (Windows, Mac)

When you try to scan a document or photo, the computer or scanner cannot be found and the scan fails.

One of the following error messages might display:

  • An error occurred communicating with the scanner or scanning device

  • No Computer Detected or Computer not found

  • Scanner not found

  • Scan to computer is currently unavailable

Troubleshoot scanner connection issues (Windows)

Identify and resolve scanner connection issues on a Windows computer.

Perform the following tasks in the order given. Use the printer after each task to see if the issue is resolved.

Use HP Print and Scan Doctor (Windows)

Use HP Print and Scan Doctor on your Windows computer to help diagnose and fix printing and scanning issues.

  1. Make sure paper is loaded in the main tray, and then turn on the printer.

  2. Download HP Print and Scan Doctor, and then follow the prompts to install and open the tool.

  3. On the welcome screen, click Start to select your printer and run the diagnostic.

  4. If your printer is not found, click My product is not listed, and then follow the instructions troubleshoot the connection.

Reinstall the HP print driver (Windows)

Uninstall then reinstall the print driver on a Windows computer.

  1. Disconnect any USB cables from the printer.

  2. In Windows, search for and open Add or remove programs.

  3. Look for your HP printer name in the list of programs.

    • If you find your printer, click the printer name, and then click Uninstall.

    • If you do not find your printer, search for and open Printers & scanners, click your printer, and then click Remove device.

  4. If a User Account Control message displays, click Yes.

  5. Follow the instructions to complete the software removal, and then restart the computer.

  6. Go to 123.hp.com to download and install the latest print driver.

Check Windows Image Acquisition settings

Windows Image Acquisition (WIA) allows communication between the computer and scanner. If WIA is not on or running correctly, scan jobs can fail.

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

  2. Next to Windows Image Acquisition (WIA), check the Status and Startup Type.

    • If the status is 'Started' or 'Running' and the Startup Type is 'Automatic', WIA is working correctly. No further action is required.

    • If the status is 'Disabled' or blank, continue with these steps.

    Windows Image Acquisition service status
  3. Right-click Windows Image Acquisition (WIA), and then select Properties.

  4. On the General tab, select Automatic from the Startup type drop-down.

  5. Under Service status, click Start.

  6. If the Start button is grayed out, return to the Services list and make sure the following services are running and set as Automatic.

    • DCOM Server Process Launcher

    • Remote Procedure Call

    • RPC Endpoint Mapper

    • Shell Hardware Detection

  7. Try to start WIA again.

Troubleshoot your printer connection

Identify and resolve printer connection issues.

Troubleshoot the wireless printer connection

Check network issues and setup requirements if the printer is not found during software installs or when wireless print jobs fail.

  • Poor network connection: Move the printer and computer or mobile device closer to the wireless router, and then check if the signal quality improved. Try opening a website to see if the internet connection is working properly. If Wi-Fi is slow or intermittent, restart the router by disconnecting the power cord, waiting 15 seconds, and then reconnecting the cord.

  • Printer is off or in sleep mode: Touch the control panel menu or press the Power button to wake the printer and put it in a ready state. Sometimes the printer status might display Offline when it is actually ready.

  • Check the printer connection status: Make sure the wireless signal is on, and the printer is connected to the same network as your computer or mobile device. If your printer has a light next to a Wireless icon or button , make sure the light is on. If it is off or blinks the printer is disconnected from the network.

  • Reconnect the printer to the network:

    • Printers with touchscreens: Open the Wireless Setup Wizard from the Wireless, Settings, or Network Setup menu. Select your network name, and then enter the password to complete the connection.

    • Printers without touchscreens: Press and hold the Wireless button on the printer until the light starts blinking. Within two minutes press and hold the WPS button on the router. The light on the printer stops flashing when the connection completes.

  • Restart devices: Restart the printer and the computer or mobile device to clear possible error conditions.

  • Print a Wireless Test Report: Search the HP Customer Support website for your printer model, and then search for self test page to find the document on how to print and evaluate the report.

  • Enable Bluetooth during printer setup (Android, iOS only): The HP Smart app uses Bluetooth to help locate the printer and set up the wireless connection to the network.

Troubleshoot the wired network connection

Make sure you are using an undamaged Ethernet cable, check for a green light near the Ethernet port on the printer, and then print a Network Configuration Page to verify the connection.

  1. Turn off the printer, and then disconnect the Ethernet cable from the router and the printer.

  2. Check the cable for damage, and then verify that it is an Ethernet cable and not a phone cable.

    Note:

    Ethernet and phone cables look similar, but Ethernet cables are usually bigger and have eight visible wires on the end.

  3. Connect the cable to a different Ethernet or LAN port on the router, and then plug it into the printer, making sure it is fully secured to both ports.

  4. Turn on the printer.

  5. Check the lights on the printer's Ethernet port to make sure the connection is successful. The green light should be steady, and the orange activity light should blink.

  6. Print a Network Configuration or Wireless Network Test Results page.

    • Printers with a control panel menu: Print the page from the Wireless, Network Settings, or Setup menu.

    • Printers without a control panel menu: Print the page using button combinations on the printer control panel.

      For most printers, press the Wireless and Information buttons at the same time, or press the Wireless and Start Copy Black buttons at the same time.

      For HP DeskJet 6000 and 6400, ENVY 6000 and 6400, and Tango printers, touch and hold the Information button until all control panel buttons light up, and then touch the Information and Resume buttons at the same time.

  7. Under the General Information section, make sure the Network Status is Ready.

    Under the General Information section, the Network Status displaying as Ready

Troubleshoot scanner connection issues (Mac)

Identify and resolve scanner connection issues on a Mac.

Perform the following tasks in the order given. Use the printer after each task to see if the issue is resolved.

Reset the print system (Mac)

Resetting the print system can clear any error states by removing all HP and non-HP printers, pending print jobs, and printer preferences.

CAUTION:

Resetting the print system removes all printers. After you reset the print system, re-add your printers to the queue.

  1. Click the Apple icon , click System Preferences, and then click Printers & Scanners, Print and Scan, or Print and Fax.

  2. Right-click or control+click anywhere in the Printers list, and then click Reset printing system.

    Clicking Reset printing system
  3. Click Reset to confirm.

  4. Type the administrator name and password, and then click OK to complete the reset.

  5. Once the reset is complete, re-add your printer. Click the Plus sign, select your printer in the list, and then click Add.

Uninstall the HP print driver and add your printer with AirPrint (Mac)

Remove any print driver and software installed on your Mac, and then add the printer with AirPrint.

  1. Download and open HP Easy Start.

  2. From the HP Easy Start drop-down menu, click Uninstall HP Software.

    Clicking Uninstall HP software in HP Easy Start
  3. Follow the instructions to uninstall all HP software.

  4. Click the Apple icon , click System Preferences, and then click Printers & Scanners, Print and Scan, or Print and Fax.

  5. Click the Plus sign.

  6. Select your printer from the list.

  7. Click the Use or Print Using field, select AirPrint from the drop-down, and then click Add.

    Selecting your printer in the list and opening the Use field
  8. If AirPrint is not available or you require a specific HP-only feature, go to HP Software and Driver Downloads to download the HP software for your printer.

Troubleshoot your printer connection

Identify and resolve printer connection issues.

Troubleshoot the wireless printer connection

Check network issues and setup requirements if the printer is not found during software installs or when wireless print jobs fail.

  • Poor network connection: Move the printer and computer or mobile device closer to the wireless router, and then check if the signal quality improved. Try opening a website to see if the internet connection is working properly. If Wi-Fi is slow or intermittent, restart the router by disconnecting the power cord, waiting 15 seconds, and then reconnecting the cord.

  • Printer is off or in sleep mode: Touch the control panel menu or press the Power button to wake the printer and put it in a ready state. Sometimes the printer status might display Offline when it is actually ready.

  • Check the printer connection status: Make sure the wireless signal is on, and the printer is connected to the same network as your computer or mobile device. If your printer has a light next to a Wireless icon or button , make sure the light is on. If it is off or blinks the printer is disconnected from the network.

  • Reconnect the printer to the network:

    • Printers with touchscreens: Open the Wireless Setup Wizard from the Wireless, Settings, or Network Setup menu. Select your network name, and then enter the password to complete the connection.

    • Printers without touchscreens: Press and hold the Wireless button on the printer until the light starts blinking. Within two minutes press and hold the WPS button on the router. The light on the printer stops flashing when the connection completes.

  • Restart devices: Restart the printer and the computer or mobile device to clear possible error conditions.

  • Print a Wireless Test Report: Search the HP Customer Support website for your printer model, and then search for self test page to find the document on how to print and evaluate the report.

  • Enable Bluetooth during printer setup (Android, iOS only): The HP Smart app uses Bluetooth to help locate the printer and set up the wireless connection to the network.

Troubleshoot the wired network connection

Make sure you are using an undamaged Ethernet cable, check for a green light near the Ethernet port on the printer, and then print a Network Configuration Page to verify the connection.

  1. Turn off the printer, and then disconnect the Ethernet cable from the router and the printer.

  2. Check the cable for damage, and then verify that it is an Ethernet cable and not a phone cable.

    Note:

    Ethernet and phone cables look similar, but Ethernet cables are usually bigger and have eight visible wires on the end.

  3. Connect the cable to a different Ethernet or LAN port on the router, and then plug it into the printer, making sure it is fully secured to both ports.

  4. Turn on the printer.

  5. Check the lights on the printer's Ethernet port to make sure the connection is successful. The green light should be steady, and the orange activity light should blink.

  6. Print a Network Configuration or Wireless Network Test Results page.

    • Printers with a control panel menu: Print the page from the Wireless, Network Settings, or Setup menu.

    • Printers without a control panel menu: Print the page using button combinations on the printer control panel.

      For most printers, press the Wireless and Information buttons at the same time, or press the Wireless and Start Copy Black buttons at the same time.

      For HP DeskJet 6000 and 6400, ENVY 6000 and 6400, and Tango printers, touch and hold the Information button until all control panel buttons light up, and then touch the Information and Resume buttons at the same time.

  7. Under the General Information section, make sure the Network Status is Ready.

    Under the General Information section, the Network Status displaying as Ready

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