Allo USBridge Signature

[cryptout]

I you don't want the blinking ACT light on your USBridge you can switch it of like so:

<snip.

Then reboot and only the Power led is now active. I did not find a way to disable that one. 

I found this on on the RPi forums. Added to config.txt as per your original post.

Claimed to work on both RPi3 & RPi4. Did you try it on the USBSig?

Code:

# Disable Ethernet LEDs
dtparam=eth_led0=14
dtparam=eth_led1=14

# 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

Will give it a go later

As @jonners  said it doesn’t  work. The USBridge uses a [Pi-CM3+ Lite 1GB v1.0] compute module which is slightly different from the normal 3+ or 4 Pi. 

https://www.raspberrypi.org/products/com...-3plus-8gb