n920c help….

i have n920c note5..i cant check the pen is working before bec of the screen or lcd is broken..when i change new lcd the pen is not working,any one can incounter this same problem,,i think replacement lcd problem,im not sure,its possible not compatible the pen in lcd or what,any idea pls,,i cant remove lcd bec of the sticker,if i remove lcd is broken,pls help me,,,