I'm having the exact same issue as OP and I haven't had the good fortune of it coming back to life yet...Would swapping the HDMI controller chip really address no video from both the HDMI or composite ports?
I had a girlfriend who had a twin sister and they would mess with me constantly.... Until one chipped a tooth then finally I could tell them apart.... Lol
@The Real Jdbye, I could see AMD trying to pull off the CPU GPU tandem thing, would be a way to maybe close the gap a bit with Nvidia. Plus it would kinda put Nvidia at a future disadvantage since Nvidia can't make X86/64 CPUs? Intel and AMD licensing issues... I wonder how much that has held back innovation.