I work on broken iPods all the time ([http://www.inovagent.com/iPod_Touch|Here is my employer's iPod repair website]) and we get water damaged iTouches in all the time. The backlight is built into the LCD and we'll try an LCD but the vast majority of the time, there is some kind of short in the motherboard that affects the backlight circuit. Your situation sounds all too similar...there isn't anything you can do at this point, I'm sorry to say.
I work on broken iPods all the time ([http://www.inovagent.com/iPod_Touch|Here is my employer's iPod repair website]) and we get water damaged iTouches in all the time. The backlight is built into the LCD and we'll try an LCD but the vast majority of the time, there is some kind of short in the motherboard that affects the backlight circuit. Your situation sounds all too similar...there isn't anything you can do at this point, I'm sorry to say.
I work on broken iPods all the time ([http://www.inovagent.com/iPod_Touch|Here is my employer's iPod repair website]) and we get water damaged iTouches in all the time. The backlight is built into the LCD and we'll try an LCD but the vast majority of the time, there is some kind of short in the motherboard that affects the backlight circuit. Your situation sounds all too similar...there isn't anything you can do at this point, I'm sorry to say.