Disclaimer: You will need a motherboard schematic, multimeter, laptop motherboard boardview, and basic soldering skills to troubleshoot this. Feel free to ignore my post if this is not possible.
How does the LCD connector look? Check F9700 for continuity. Also measure on pin 1 of the LCD connector to ground in diode mode on the mulitmeter, with red probe on ground, black probe on pin 1 of the LCD connector.