sir mene dekha he jab bhi engineer ate he panel repair ke liye o lok bolte he jetna bhi spare card available he leke ao ek ek neya change karke panel on karke dekhte he.. panel on ho geya to o card kharab he bolte he.. mager ap jese bole kabhi cheak karte huye mene dekha nahi he.. kuch neya sikha ne ke liye lots of thanks sir. ❤