here are the amendments to boot/config.txt file. For BULLSEYE, you have to use different parameters to make them work these work for pi3 and pi 4 Pre BULLSEYE Disable the PWR LED dtparam=pwr_led_trigger=none dtparam=pwr_led_activelow=off Disable the Activity LED dtparam=act_led_trigger=none dtparam=act_led_activelow=off Disable ethernet port LEDs dtparam=eth_led0=4 dtparam=eth_led1=4 BULLSEYE ONLY Disable the PWR LED dtparam=pwr_led_trigger=default-on dtparam=pwr_led_activelow=off Disable the Activity LED dtparam=act_led_trigger=none dtparam=act_led_activelow=off Disable Ethernet port LEDs dtparam=eth_led0=4 dtparam=eth_led1=4