This 820-2849 Turns on for 5 seconds, off for 5 seconds and repeats this over and over again. If its on every Rail except PPVCORE_GPU is present. PPVCORE_GPU is 0.05V. U8900 seems to have all signals it needs and i get ~6 Ohms to GND on it. Is that to low? Is there anything i forgot to check or is it the GPU? From my experience with the 15" 2010 models i know these Nvidia GPUs as normally reliable - not only in comparison with the 2011 AMD ones...