hii freinds my probleme is about the keyboard lights,he doesn't work even in dark room..and when i slide the keyboard the mobile doesn't unlock..so i did think that's a hardware probleme but after instaling the application Keyboard LEDs i found that they work well and i don't know where is the problème exactly
also when someone call me or when i make a call the screen lights doesn't switch on intel i unlock the screen by the unlock key,knowing that my notification LEDs works well
notice: i already did a vanilla flash but no change!!!!
finally sorry about my anglish

try healthcheck
after some swiping / taping it will show you a screen with state of all sensors
one of them is "Keyboard Slider" (top right)
go back (swipe from left to right) slide keyboard and go forth again (swipe from right to left)
if state doesn't change (most likely always closed) this is most likely the culprit (i.e. the defect sensor)

firstly thanks misterc for replying..yes that's right it's always say ''closed'' in healthchek even when i slide the keyboard and i comeback again!!!! so what i must do plzzz

otherways..what thas it mean << the culprit (i.e. the defect sensor) >> and what's the solution!!!

if anyone can help me..i will be greatful,misterc can you explain more plzzzzz? it's really urgent