I have a Sony Ericsson. i have a Sony Ericsson w300i that iv hd for abot 15month and now wen i

Question

i have a Sony Ericsson w300i that iv hd for abot 15month and now wen i open my phone there is a blank screen and on the sreen on the otherside there is nohing i can't get see anything but i can still get to music and other stuff is there anyway of fixing my phone as all my nubers and everything are saved on it so i can't tranfere anything!!!