How can I fix the broken LCD pin
I broke the pin connector of LCD to the logic board.
Is there any way to fix ?
Not sure if you mean the pin on the flex connector or logic board. But either way if the pin has broken off you will have to get a new screen or a new connector soldered on to the logic board.
I would if i was you, back up your stuff through Itunes and replace the logic board they are only like 40-60 bucks on Amazon
Connectors are replaceable by microsolderers, however it is often signs of troubleshooting something else. On a 6 plus, connector damage commonly occurs during troubleshooting when the underlying problem is the epidemic touch disease. Definitely repairable for data recovery, but with multiple problems it might be more economically viable to just replace this older device if data isn’t important.