My Epson xp-430 did an automatic firmware upgrade last week to version MO24k1 and no longer recognized my non-Epson cartridges.
I purchased a firmware downgrade key here and followed the steps:
Disabled automatic firmware updates
Disable status monitor utility
Attached printer with USB cable to PC
Put printer in service mode
Uploaded older firmware using the purchased key
The printer’s window showed the file downloading then installing and finally finished but the firmware did not downgrade and remained version MO24k1 and still will not accept the non-epson cartridges.
I sent a request for support which has not been responded to.
What steps should I take now since the paid key can only be used once and it obviously did not work?.