I wanted to turn my old perfectly working computer into a dedicated software RAID server. I bought an identical motherboard off ebay to have a spare, and some extra parts to complete the system. This is what I have: Asus M2n-E motherboard (2 of them) AMD Athlon X2 4600+ Corsair 4GB DDR2 Ram ATI 5450 GFX Card WD 160GB HDD Corsair TX650W PSU Storage HDD will be bought once this is working I took out the CPU and RAM from the computer and put it into the eBay board to test it. Then I put it into the case, and attached the PSU and GFX card. Pushed the power button, fans spin, HDD makes some noise but nothing on the screen or any beeps. Reset the BIOS on the eBay board, still the same. Try the dual RAM sticks independantly, still the same. Tried a different GFX card, different PSU, and no change. So I thought the Ebay board was broken. Sent an email to the seller and began to put all the parts back into my old motherboard. Here's the kicker, once everything was back into my motherboard, the exact same problem. Fans spin, LEDs on, HDD clicks but nothing on the screen or any beeps. Tried different RAM, PSU, GFX Card, Monitor, cables, no luck! I thought I had damaged the CPU as I had a bit of difficulty installing the new heatsink (an Arctic Cooler Freezer 7 Pro) so I bought a new CPU (AMD Athlon X2 5200+) but still the exact same problem. Nothing on screen, no warning beeps. I am at wits end, I have tried everything and it still won't work. I have used 2 PSUs, 2 GFX Cards, 2 monitors & 3 cables, 2 CPU's, 2 Motherboards, 2 HDDs, and tried the Dual DDR2 sticks independently. The only thing I haven't tried changing is the upgraded heatsink!! I am at wits end, can anyone tell me why my computer will not show anything on the screen or make any beeps??? *Edit All troubleshooting spares (PSU, GFX card, and monitor) came from my main rig which is still working. The second CPU is one I bought brand new not off Ebay. Heatsink was a stock cooler before upgrading to the Freezer 7.