Nokia 8800e keyboard light problem

I replaced the Accelerometer IC ( N2700 ) . After that it have problems. When incoming call , the keyboard light is off and the phone is suspended. Then i press any key , it says " End the call first" . Restart phone it will be normal , when incoming call it will be again
I’ve remove N2700 , CPU + Flash and put it again but nothing changed. Now it look like missing Pin number 9 on the mainboard. Is that problem?
Someone did that , please help me . Thank you so much