proximity sensor problem

[20]

I have xperia Sl with jelly bean 6.2.b.0.211 .....my proximity sensor doesnt work  when I put my hand on the sensor or when I make a call the screen still open plz help

[masurkarns]

Try to update latest firmware .96
If not solved then it might mother board issue
So go to service center

[Uliwooly]

double check if there's anything near the proximity sensor