The N950's keyboard slide sensor is not working.help me.
 

First,I'm sorry for my bad English.
Now,the device think the keyboard is open.but the keyboard is closed.and the keyboard backlight is also turned on.
So i can't input by virtual keyboard.and the QML applications always run with landscape.
I think the keyboard slide sensor of N950 is bad.
I want to know the keyboard slide sensor of N950 is magnetic sensor?
And where is the sensor and magnet?who knows?Tell me.Thanks. :)
And I am not sure that the sensor is not working?or the magnet is lost?Who can tell me how to check the sensor is working?by Phoenix?Thanks.
And can it close slide st:)atus by editing something in /sys directory.Like: echo 0 > /sys/...... Who knows where is the keyboard slide status in /sys directory?Thanks. :)
Thanks for youe help. :)