7250i no back light?

hey all.

i bought a water damaged 7250i. had a friend that has a phone bath. so put it in that, and it now works again apart from one minor fault.
theres no back light. you can only just about see whats on the display. the rest of the phone is fully functional. vibrates, rings and plays the nokia start up tone. the key pad lights up. just cant see much on the display. i believe this to be a back light fault, but im not sure. ive tried a different LCD but still get the same problem. Does anyone have any idea of how this problem can be fixed??
All comments & help is greatly appreciated. Thankyou for your time. Best wishes Focus_RS :grin: