Having trouble with FX monsoon

It’s been a while since I’ve been on the site looks like we have a new home. I also got a new home which allows me to shoot again in my backyard. So I got out my old FX monsoon today and it is not cycling properly. does anybody know someone willing to work on these? Sometimes it will not cycle a pellet in the chamber, And other times it will rapidfire and dry fire. the trigger is super touchy and I can’t seem to figure it out thank you for your help