Lexmark Firmware Update Locks Out CX421 Printer Cartridges. Homepage › Forums › Toner News Main Forums › Lexmark Firmware Update Locks Out CX421 Printer Cartridges. Tonernews.com, June 5, 2023. USA This topic is empty. Viewing 1 post (of 1 total) Author Posts #407301 jimKeymaster Author June 5, 2023 at 4:53 PM Viewing 1 post (of 1 total) You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Log In Its Free! Click Here to Share your Success Stories with Tonernews.com and We'll Publish it for You!
