The issue of a Lexmark printer not connecting to WiFi is quite common for printer users. But it is simple to get it fixed. If you have a Windows PC and you want to fix a Lexmark printer that is not connecting to your WiFi network, try these fixes to get the issue resolved in minutes:
Perform a Quick Restart
Power off both the printer and the WiFi router.
Wait for a minute or two.
Turn on both the printer and router.
A quick power cycle can help refresh the network settings and remove temporary glitches.
Run the Wireless Setup Wizard
On your printer’s control panel.
Tap the Settings icon.
Open Network Settings or Wireless Settings.
Select the Wireless Setup Wizard to restart the network setup.
Choose your WiFi network name from the list.
Enter the WiFi credentials and click the “OK” or “Confirm” option.
Update/Reinstall Drivers
Go to your web browser and search the official Lexmark website (support.lexmark.com).
On the support page, enter your Lexmark printer model name.
Select your printer from the list.
Choose your operating system (OS).
Select the latest driver package and let it download entirely.
From the Downloads folder, open the downloaded file.
Click “Yes” when prompted.
Accept the license terms, follow the on-screen steps, and then click on “Finish.”
Disable “Use Printer Offline” Mode
Press the Windows Start button.
Select Settings > Bluetooth & Devices > Printers & Scanners
Choose your Lexmark printer.
Click on “Open print queue” and check that the “Use Printer Offline” mode is disabled.
Source:- Lexmark Printer Not Connecting to WiFi