IPhone 3G, no light from LCD / backlight.

My screen is not lighting up. I can see the icons and what I'm doing on the phone under light, but the screen is not producing any light. I tried replacing the LCD and I still have the same issue. Is there another component I should try to replace, or is this a motherboard issue or something completly different?
Thanks
Message was edited by: sLiPpErY_gOo

Is there another component I should try to replace, or is this a motherboard issue or something completly different?
Nobody here can say for sure.
Time for a new phone.

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