First time posting here and thought I would see where this forum is in terms of repair..I am working on a customer's BB 8310 with h20 damage. I have restored everything except the backlight on her LCD. The LCD and everything else works on my test phone so this problem is the MoBo. I believe I have isolated it to where the Toggle/trackball is located but I'm not sure. I have tried my solvent first lightly with a qtip, then with a brush, and now totally submerged; each time allowing it to dry over night in my Nail Dryer. Still the back light is off, but you can see the little hour glass in the dark screen. My solvent is amonia based and has been very successful thoughout the years. Anyone out there have any suggestions? Thanx in advance.