All, I have had a home built HTPC for 5 years. My specs are as follows: 1. ASUS A8N-E Mobo 2. AMD Athlon 3800+ CPU 3. 2 Samsung 200GB HDs 4. 256 NVIDIA 9600 Graphics Card About a week ago, I was watching TV and everything all of the sudden went blank. I went down to the basement to check on the HTPC and found that it was completely dead. No power. Nothing would turn on with the power button. I remembered that a few months ago, the power supply fan stopped running and took some manual effort to get it running again. I assumed that the fan had stopped and the power supply overheated. Problem is, the case I own has a proprietary power supply. So, I ordered a new case and new power supply (500W). I transferred all of my cards, Hard drives, DVD drives, etc. I turn the machine on. All of the fans spin (case, chipset, CPU). The LEDs turn on to show Hard Drive activity.and something briefly appears on the monitor saying something along the lines of "boot drive failure" (not sure of the actual text or what it means). I restarted the machine and now I see nothing onscreen (not even the boot drive failure message). Again, everything turns on. It appears that something should be happening on screen, but I get nothing. The speaker beeps once........not sure what that means. I've tried the following: 1) Connected via VGA, 2) connected via DVI-->VGA, 3) connected via HDMI - None of these worked. I also tried switching out the video card to an older card that worked fine when I pulled it out of the HTPC about 6 months ago. Tried a new monitor. Nothing shows up onscreen at all. Also, not sure it's relevant, but the USB ports don't appear to be working. I added a wireless USB keyboard/mouse. It has an LED that does not turn on when I plug it in? Perhaps because I haven't gotten passed the initial boot up? Is it a video card issue? Hard Drive issue? Mobo issue? CPU issue? I would have thought that at least the opening screen and bios would appear on the screen. Is it possible that I missed a connection somewhere on the mobo? Which one might cause this? I'm at a complete loss here and I feel like I've tried everything. Please help. Thanks.