hello i bought a faulty radeon r9 290 (black screen) to learn to fix gpu's, when it arrived i mesured resistances on 3.3 v and 12v both on the pcie connector and cables i have no idea on how to recognize 1.8v pex and 5v but i checked all inductors and none had a dead short only one was 55 or 140 ohms i don't really remember and i assumed it was memory i installed it on the pc and it delivered no image, not even a backlight so i installed it as a secondary graphics card using the igpu as primary, both device manager and gpu-z only showed the igpu so i assumed it was acutally a no detect even tough...