Tag Archives: Key firmware Epson WP-4540

How To Downgrade Firmware Epson WP-4540

Why Use Epson WP-4540 Firmware Key – Epson WP-4540 downgrade firmware key: this is required when NON-ORIGINAL ink cartridges are NOT recognized by the printer. This is because printers’ firmware has been updated from the Epson server to the newest firmware where not original ink cartridges are forbidden to be …

Read More »