Balu 0 Report post Posted February 25, 2021 i cannot downgrade my WF-7720 [FA27K7] to version [FA27HC] in NORMAL MODE: i did my best on the manual but the printer does not restart [i wait 2 hours, hangs up]i unplugged the cable and after 5 minutes plugged in: => starting Recovery Mode i have reinstalled the firmware FA27K7 with "wicreset recovery firmware" in recovery mode <= this works in RECOVERY MODE:i receive an error message: ROM IS NOT WRITABLE Share this post Link to post Share on other sites
wic.support 30 Report post Posted February 26, 2021 This version of the firmware has been blocked on your device by epson and could not be installed. You need to use firmware from Chipless Solutions: https://chiplesssolutions.com/download.shtml Share this post Link to post Share on other sites
jules 0 Report post Posted November 25, 2023 the same for me, the update does not take place in normal mode, I have to restart the machine so it goes into recovery mode. the problem is that in this mode it puts "rom no reritable" Share this post Link to post Share on other sites
John_Admin 388 Report post Posted November 26, 2023 This topic will explain how to upload firmware to the printer by pulling out power cable during critical operation and corrupting data on the motherboard. https://forum.2manuals.com/index.php?/topic/80708-updating-firmware-using-recovery-mode/ Share this post Link to post Share on other sites
Rien1949 0 Report post Posted March 18 thank you! Tellthebell Share this post Link to post Share on other sites