crwdns2933897:0crwdne2933897:0

How to fix left trigger not registering

Hello, i have purchased a google stadia controller from a guy second hand, with the problem being that the left analog trigger doesn't recognize at all and i would like to know how i could fix this problem.

crwdns2934089:0crwdne2934089:0 crwdns2934093:0crwdne2934093:0

crwdns2934109:0crwdne2934109:0

crwdns2853045:0crwdne2853045:0 crwdns2853046:0crwdne2853046:0
crwdns2889612:0crwdne2889612:0 0
crwdns2934285:0crwdne2934285:0