My wife has a computer with an ASUS P5ND motherboard that's been failing to boot lately; I'm not sure what's causing it, but it may be a motherboard problem, so I'm posting here. Essentially, what happens is that the BIOS boots partially (including a successful sounding startup beep) and then the screen goes black. This had been occuring during the Windows boot process (I run Vista; the Windows logo would appear briefly, and then the screen would go blank and the booting process would hang), but now I'm getting a message saying that the BIOS post failed and then the screen goes black. I can then press delete to enter setup, but the screen blacks several seconds afterwards. Admittedly, this may be a video card problem (feel free to move it if so), but my wife noticed no graphical artifacting or other signs of damage (other than a Skyrim crash to desktop, which is probably par for the course for the game). For what it's worth, she has a GeForce SLI setup of some kind (I'm not sure what, but if it would be helpful, I can check); I've tried reseating the cards and the bridge to no avail (though immediately after doing this, I *was* able to view the set-up screen successfully, without the screen going blank; further reboots led to the blanking set-up screen again). Anyway, if anyone has any suggestions as to the nature of this problem before I take it in for repairs, I'd greatly appreciate them. I'm pretty mystified, and I've not seen anyone discussing similar problems on the Internet.