Verify that Spark LINK TX and RX are correctly connected to their respective ends.
Spark LINK TX (Transmitter) comes with the up arrow symbol (^) and a black ring at the end of the 1/4" jack.
It should be plugged into your instrument.
Spark LINK RX (Receiver) comes with the up arrow symbol (∨) and a golden ring at the end of the 1/4" jack.
It should be plugged into your amp/audio interface.
Make sure both TX & RX are powered up and successfully paired.
When Spark LINK TX & RX are paired, the LED status will change to a solid Green/Yellow/Red light (Depending on the battery status).
Make sure the TX is not in Mute Mode (Check the LED indicator on the TX; it should display a solid LED status).
The LED indicator on the Spark LINK TX starts blinking when it's in mute mode.
Power off and power up both TX & RX, allowing them to repair with each other again.
If you've tried all the above steps and the Spark LINK still doesn't work, please reach out to our official support. We'll be happy to help you resolve the issue you're encountering.