Ok so this one is PITA. Came in no previous work done to it no liquid. No external or internal display. Resoldered U8900, external display is back; however, I could see image just no backlight. Replaced Q9707, Q9706, C9712/3 (ended up the culprits), and backlight came back. However, I get no video on the screen on the internal display. When you hit the power button, you immediately get no image but backlight. After 3 seconds, it chimes and boots externally while the internal screen flashes once and then does nothing. Tried known good display same thing. All of the filters between the DP_INT measure fine (F9000/1/2/3). I do get volts to the screen and I obviously now have backlight. Any ideas??? This one is weird never seen this issue before. I also don't have a USB light on the main board USB port, but I do on the RIO port.