Ranjo Nawzad 0 Report post Posted May 31 I bought key for 579r, i updated firmware then wanted to activate it but i get reading error - 1 as shown in atachments, what i did wrong? Share this post Link to post Share on other sites
John_Admin 386 Report post Posted May 31 You have to upload firmware to printer in NORMAL mode - not Program Update mode. Share this post Link to post Share on other sites
