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For the Printer Offline in Lexmark issue, see if the printer’s power is on or not. Connect the power supply to a functioning power source as well. Now determine whether or not the printer's flickering lights are signaling a warning.
Examine the printer connectivity instead. If there are any hardware problems, these can be physically addressed. You may, for instance, reorganize the papers or examine the toner cartridges. Download and reinstall the Lexmark printer drivers from the official website if they are broken or unavailable.