If you don’t like or need to see the LEDs [2] blinking, you can toggle LEDs Off [1] with once click.
JP-80×0 Editor User Manual – LEDs Off
TIP: Open ADVANCED MIDI SETTINGS page you can define if LEDs will blink when MIDI is being received or when it is being transmitted. Default value is set to follow incoming MIDI data.
JP-80×0 Editor User Manual – Tracking incoming MIDI for LEDs