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HP Customer Support - Knowledge Base

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Information

Need Windows 11 help?
Check documents and videos on compatibility, FAQs, upgrade information and available fixes. Windows 11 Support Center

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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.

Make sure paper is loaded in the main tray, and then turn on the printer.
Download HP Print and Scan Doctor, and then follow the prompts to install and open the tool.
On the welcome screen, click Start to select your printer and run the diagnostic.
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.

Disconnect any USB cables from the printer.
In Windows, search for and open Add or remove programs.
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.
If a User Account Control message displays, click Yes.
Follow the instructions to complete the software removal, and then restart the computer.
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.

In Windows, search for and open View local services.
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.
Right-click Windows Image Acquisition (WIA), and then select Properties.
On the General tab, select Automatic from the Startup type drop-down.
Under Service status, click Start.
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
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: Place the printer within range of the Wi-Fi router signal, and then connect it to the network.
- Printers with a touchscreen control panel: Open the Setup, Network, or Wireless settings menu, select Wireless Setup Wizard, and then follow the instructions to select the network name and enter the password.
- Printers without a touchscreen control panel: Press and hold the Wireless button for five seconds or until the wireless light starts to flash. Within two minutes, press and hold the WPS (Wi-Fi Protected Setup) button on the router until the connection process begins. The printer wireless light stops flashing when the connection completes.
- HP Deskjet 6000 and 6400, ENVY 6000 and 6400, and Tango printers: Press and hold the Wi-Fi button and the Power button on the back of the printer for five seconds until the blue bar flashes. Within two minutes, press and hold the WPS button on the router until the connection process begins. The blue bar 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 for an HP Smart app setup: Enable Bluetooth on your computer or mobile device so that HP Smart can detect the printer during the setup.

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 report to verify the connection.

Turn off the printer, and then disconnect the Ethernet cable from the router and the printer.
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 connector.
Reconnect the cable to a different Ethernet or LAN port on the router, and then connect the other end to the printer's Ethernet port.
Turn on the printer.
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.
Print a Wireless Network Test Results or Network Configuration report.
- Inkjet printers with a control panel menu: Open the Wireless, Network Settings, or Setup menu to locate the list of available reports.
- Most inkjet printers without a control panel menu: Press the Wireless and Information buttons at the same time, or press the Wireless and Start Copy Black buttons at the same time.
- LaserJet printers: Press and hold the Wireless button for 10 seconds or until the Ready light blinks, or go to the Wireless menu and select Wireless Network Test.
- Laser NS and Neverstop Laser printers: Press and hold the Resume and Wireless buttons for 3 seconds.
- 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.
Make sure the Network Status is Ready, or follow any instructions to resolve network issues identified on the report.

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.

Click the Apple icon , click System Preferences, and then click Printers & Scanners, Print and Scan, or Print and Fax.
Right-click or control+click anywhere in the Printers list, and then click Reset printing system.
Click Reset to confirm.
Type the administrator name and password, and then click OK to complete the reset.
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 the print driver and software installed on your Mac, and then add the printer with AirPrint.

Download and open HP Easy Start.
From the HP Easy Start drop-down menu, click Uninstall HP Software.
Follow the instructions to uninstall all HP software.
Click the Apple icon , click System Preferences, and then click Printers & Scanners, Print and Scan, or Print and Fax.
Click the Plus sign .
Select your printer from the list.
Click the Use or Print Using field, select AirPrint from the drop-down, and then click Add.
If AirPrint is not available or you require a specific HP-only feature, go to HP Software and Driver Downloads to download the HP driver.

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: Place the printer within range of the Wi-Fi router signal, and then connect it to the network.
- Printers with a touchscreen control panel: Open the Setup, Network, or Wireless settings menu, select Wireless Setup Wizard, and then follow the instructions to select the network name and enter the password.
- Printers without a touchscreen control panel: Press and hold the Wireless button for five seconds or until the wireless light starts to flash. Within two minutes, press and hold the WPS (Wi-Fi Protected Setup) button on the router until the connection process begins. The printer wireless light stops flashing when the connection completes.
- HP Deskjet 6000 and 6400, ENVY 6000 and 6400, and Tango printers: Press and hold the Wi-Fi button and the Power button on the back of the printer for five seconds until the blue bar flashes. Within two minutes, press and hold the WPS button on the router until the connection process begins. The blue bar 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 for an HP Smart app setup: Enable Bluetooth on your computer or mobile device so that HP Smart can detect the printer during the setup.

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 report to verify the connection.

Turn off the printer, and then disconnect the Ethernet cable from the router and the printer.
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 connector.
Reconnect the cable to a different Ethernet or LAN port on the router, and then connect the other end to the printer's Ethernet port.
Turn on the printer.
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.
Print a Wireless Network Test Results or Network Configuration report.
- Inkjet printers with a control panel menu: Open the Wireless, Network Settings, or Setup menu to locate the list of available reports.
- Most inkjet printers without a control panel menu: Press the Wireless and Information buttons at the same time, or press the Wireless and Start Copy Black buttons at the same time.
- LaserJet printers: Press and hold the Wireless button for 10 seconds or until the Ready light blinks, or go to the Wireless menu and select Wireless Network Test.
- Laser NS and Neverstop Laser printers: Press and hold the Resume and Wireless buttons for 3 seconds.
- 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.
Make sure the Network Status is Ready, or follow any instructions to resolve network issues identified on the report.

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