On some monitors (more typically the older ones), the EDID is just stored in an ...

ansible on Aug 30, 2023 | parent | context | favorite | on: Hacking the LG Monitor's EDID

On some monitors (more typically the older ones), the EDID is just stored in an I2C EEPROM. So it may be possible to just re-program it. I don't know what they do on newer monitors, it could just be something listening to the I2C in the HDMI connector and pretending to be an EEPROM.