I've built this new pc: Intel i3 3225, ASUS P8H77-M PRO, 120 GB Kingston SSD and a Sea Sonic Electronics S12II-380B 380W CPU. I've installed Windows 8 and it worked pretty fine for two days. Then, being unsatisfied with Intel Graphics being unable to separate the display and video settings as nVidia card did, I tried to see whether my old graphics card would fit in the PCI slot. While I tried to see where it could fit in I touched the case of the computer with it and a crackling sound came from the speakers. Although the pc was open I inclined to think I have not touched the motherboard but one of the metal removable bars which are removed when an extension card is placed in one of the slots. Since then I heard a constant hissing sound from the speakers which after uninstalling/reinstalling the Realtec HD audio drivers which is now replaced by a dead silence. I can now listen through my wireless headset only, there is no sound from the speakers. And the thought that I could have killed the sound capability of my PC on the second!! day of its life instills a very dreadful feeling in me. But .. perhaps not all is lost (i.e. no hardware repair will be needed, Perhaps a system reinstall ?), or in the other case is this little box with audio jack-ins replaceable/repairable ? I would appreciate your reply. Thank you.