I have an epson 1500w with updated firmware. I want to use OEM cartridges.
I paid for a firmware key last year but I couldn't get it to work, but I want to try again.
I already bought a key from you "Your Firmware Key for WIC utility order is complete (#21483516)"
I tried but I didn't succeed in downgrading.
Is it possible for me to reset and unlock the OEM cartridge capability?
"Current version of the firmware is AO18C5."