r2 trigger doesn't work after reassembling.

Nothing is broken or scratched but r2 button sometimes is wirking like if was pressed sll the time and others just is not responding

crwdns2893858:0crwdne2893858:0 crwdns2893862:0crwdne2893862:0

crwdns2894050:0crwdne2894050:0

crwdns2889612:0crwdne2889612:0 0
crwdns2892346:0crwdne2892346:0