I am hoping someone can help me. I have a hp dv9700 that originally would not start up at all. The lights would blink once and then nothing. So I re-seated the RAM, hard drive, dvd, battery, etc. with no luck. So I figured it must be the GPU. I figured at this point that it needed to be reflowed. I carefully heated the gpu up for 14 seconds. Then when I put the laptop back together I pressed the power button. The lights came on, fan came on, but no screen. I finally got the screen to work by repeatedly powering off and on with the screen adjusted at different angles, until I found one that worked. If I moved the lcd away from this position while booted up and back the screen would go black, then back on. Next I tried external monitor, which works consistently every single time. Boots up no problem. I am wondering if the problem is inverter, backlight lamp, lcd cable, or still GPU. I did not have a heat sensor so I did my best with it. Is it possible that one of these other parts have also went bad? Thanks.