A Yocan Trio pod system user question:
i have tried replacing cartridge and cleaning all contacts but still just blinks green light at me.

The Yocan Trio battery indicator light will blinking 3 times when it can't detect the cartridge.
And flashing 4 time when the pod short-circuited.
When its low battery status, the device indicator light will flashing 10 time.

First of all, please check how many times does the indicator light flashing.
You can refer above 3 conditions to fix it.

If you have clean the contact points, please try to install another trio pod.