It was working fine a week ago but now it does not connect to wifi.

[Umapandi]

 It was working fine a week ago but now it does not connect to wifi not working 

[Max3Aj]

@Umapandi, Welcome to HP Support Community. 

Thank you for posting your query, I will be glad to help you. 
I understand your HP Smart Tank 589 All-in-One Printer was working fine a week ago but is now unable to connect to Wi-Fi. Let’s walk through some steps to get it reconnected.

Restart Devices

• Power off your printer, router, and computer/mobile device.
• Wait for 60 seconds.
• Power on the router first, then the printer, and finally your computer or mobile device.

Check Wi-Fi Network

• Ensure your Wi-Fi is working for other devices.
• Make sure the printer is within range of the router and there are no obstructions or interference.

Reconnect the Printer to Wi-Fi

Use the HP Smart App or the printer’s control panel:

Using HP Smart App:

• Download or open the HP Smart App.
• Tap + to add a printer.
• Follow the on-screen instructions to connect the printer to your Wi-Fi network.

Using Printer Control Panel:

• Press and hold the Wireless button until the wireless light starts blinking.
• Press and hold the WPS button on your router for 3–5 seconds.
• Wait for the printer to connect. The wireless light will stop blinking and stay solid.

Reset Network Settings (if needed)

If the above steps don’t work:

• On the printer, press and hold the Wireless and Cancel buttons together for 5 seconds.
• This will reset the network settings. Then try reconnecting using the HP Smart App.
   

 You may refer to this document - Troubleshoot a Wi-Fi connection to an HP printer | HP® Support

Also, this - HP printers - Wi-Fi connection is lost after router or network settings change | HP® Support
 

I hope this helps. 

Take care and have a good day. 

Please click “Accepted Solution” if you feel my post solved your issue, it will help others find the solution. Select "Yes" on the bottom left to say “Thanks” for helping! 

Max3Aj

HP Support