To switch Lexmark Printer Offline to online, go to the settings option and then click on printers. Right-click on your printer and choose to use the printer online. Print out the test page to check if the printer is online.
Make sure there is paper in the tray(s), check the ink or toner cartridges aren't empty, the USB cable is plugged in or the printer is connected to Wi-Fi. And if it is a network or wireless printer, try using a USB cable instead.
One of the most common Lexmark printer issues is that the printer is not responding to print requests. ... Restart your printer. In some cases, a simple restart can fix the issue. Unplug the printer and check if there is any paper stuck in the machine, and if the toner is installed correctly.