Lexmark XC4240
Turn off the printer, and then unplug the power cord from the electrical outlet.
Using a damp, soft, lint‑free cloth, wipe the touch screen.
Notes:
Connect the power cord to the electrical outlet, and then turn on the printer.
Unusual or erratic touch screen display issues after upgrading the firmware to certain version 23.0 RIP firmware releases (xxxxx.230.204 through xxxxx.230.210).
Regular printer maintenance extends the life of the printer and ensures quality prints. The process is simple and only takes a few minutes.