So 1 day after a storm my PC stopped working. I figured something burned. Dont have many spear parts for swapping, so i'm buying 1 by 1 to see whats wrong. Maybe someone here can narrow it down if i list the symptoms. I'm 99.9% sure its not the Power Supply. I tested all of the leads (20pin into MB) with a multimeter and all seem to have the right voltage on them. CMOS battery is also fine. Dont know any way to test the CPU so I bought another one(p4) and put it in the MB. No change. SO that pretty much leaves the MB. but i'm still not sure. I ordered a new one but still waiting for it. As of right now i'm not getting anything. Nothing on the screen (monitor works 100%), no BIOS, no beeps. Nothing. on the front panel the green LED is on, the red (power) is not? All the fans on the MB work. Fan on Video Card works. Both new CPU and old CPU get warm (hot) when PC is on. (I touched the heatsink with my finger to test). I'm not an expert, expert, but i have been doing more and more research and teaching myself. I just dont get, if MB is dead why are fans on (including video, thats powered from the AGP not powersupply directly)? why is CPU hot? But then again, why am i getting no beeps! not when i take the ram out, not when i take the video card out. any ideas?

i would suspect your psu AND motherboard. A PSU can often send enough power to spin fans and light LEDs, but not enough to boot and run a stable PC. And if your motherboard was damaged it might not get the beep codes right. typically if your mobo was okay, you should be able to get it to beep at you for trying to boot with no RAM or something like that. I'm all about the scientific process when troubleshooting, and changing one variable at a time, but when dealing with damaged components like this you have to be careful: If the PSU, mobo, or cpu are damaged for example, changing out any one of the other components and exposing a new, working component to a defective one can ruin the new component. So in your case, for example, i would recommend that since you've tried the same PSU and mobo with 2 different CPUs, you should stop testing that configuration before you fry both CPUs, and try with a new PSU and/or motherboard.