Low backlight on my iPod

My iPod touch 4g has a low bvacklight due to water damage. Everything works such as the sound, touch and it is regognized by iTunes. Replaced the screen but still it has low backlight. So I decided to deassemble the iPod. I guess it a problemwith the backlight ic coil. I have'nt yet found where the backlight ic coil is so please help. I would like if you guys could post me links to buy the backlight ic coil and also show me some pics where I can find the backlight ic coil. Thanks.