About 2 weeks ago I built a new box -- Asus P4P800 SE mobo (rev 2.00/BIOS 1007) Intel Prescott Pentium 4 3.00E GHz CPU 2x Geil 512mb DDR w/headshields (total=1gb) Asus Radeon 9600 XT/TVD 128mb video Sound Blaster Audigy 2 Hercules 430w PS All items were bought new from NewEgg and ZipZoomFly with the exception of the PS, which was bought off a major vendor on eBay who claimed it was new, but, ya never know. Being that I've built systems frequently in the past, the build itself was a piece of cake. It booted up 1st time and all was well for about 4 days. I did notice the system was a bit hot (about 61c at full load) so I ordered a 3rd party HS/Fan (Thermaltake). The day before it arrived, while playing World of Warcraft, the system inexplicably died. The screen just went blank and the system shut off. (No beeps, btw.) I did a thorough diagnosis, removed components, re-installed them, pressed the power button, and each time the fans spin, the hard drive whirrs and the power lights come on, but the system does not post, there are no beep codes, and there is no video signal (altho the monitor does detect itself being plugged in to something). Tried doing a manual mobo reset but to no avail. Intel replaced the CPU (still, no post, even with a new Thermaltake HS/fan and Artic Silver 5), but Asus hasn't even responded to my 1st request via their web site (I guess they no longer do phone support?). I'm at a loss. I'm thinking that it probably isn't the PS because everything spins up, but is it possible that something on the mobo went bad? The BIOS, perhaps? Not sure if this makes a difference, but I installed all of this in a case I bought from CompUSA... standard ATX. It already had a plate installed in it so I didn't need to use standoffs, I just laid the mobo on the plate and affixed it with screws. I read something about making sure the mobo isn't grounded to the chassis, but it's been so long since I built a box (about 4 years) that I'm not sure if maybe I fried my mobo by mistake by not using something I should have? Any help is appreciated... the wife is wanting me off her system.