scanner not connecting with computer

[kush100]

message 21345.  Failed to make connection to computer.  Using a Macbook pro

None of the solutions work that are listed.  This happened before and there was a simple solution which I can't remember.  

[VikramTheGreat]

Hi @kush100,

Welcome to the HP Support Community.
 

Thank you for posting your query. I will be glad to help you.

The HP Printer error message "-21345" indicates a failed connection to the printer, often during scanning or printing over a network. This error can be caused by network issues, software problems, or even the printer itself. 

 

Here's a breakdown of troubleshooting steps:

1. Check Physical Connections:

• Ensure the printer is properly connected to your computer via USB or network connection.
• Verify that all cables are securely connected. 

2. Restart Devices:

• Restart both the printer and your computer.
• If using a network printer, also restart your router. 

3. Network Issues:

• Make sure your printer is on the same Wi-Fi network as your computer. 
• Check for a stable network connection. 
• If using a network printer, verify that the printer's IP address is correct. 
• Consider enabling IPv4 only for the printer. 

4. Software Issues:

• Update the printer driver and firmware.
• Reinstall the printer driver software.
• Uninstall and reinstall the printer queues.
• Try using the HP Smart app for scanning. 

5. Printer Reset:

• Perform a hard reset of the printer (unplug the power cord for a few minutes). 

I hope this helps.

Take care and have a good day.

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VikramTheGreat

HP Support