Phone pls help no backlight

pls help me
i opened back case for cleaning camera lens.removed battery during work. and plugged in again. then close back case and power on phone and shocked! no backlight!
screen on, image ok. touch work, all functions work but no lcd backlight. anyone can help me i can donate him a coffe or beer .
i dont want to go sony center coz out of guarantee.
İzmirde dolaşırken araš mı kiralayacaksın http://www.izmirotokirala.com/ veya http://www.izmirrentacarrental.com/ firmaları arasında sešim yapabilirsiniz.