Hi, I recently ran into a problem with my computer, and now it doesn't post anymore it just beeps slowly. This error started when I tried to install a FireWire PCI card, and I was to stupid to understand that USB and FireWire have different protocols but the same headers, so I installed it onto a USB header, and connected the 4-pin power cable to my motherboard. Then nothing happend, and the FireWire cable was seated correctly onto the USB header, so i thaught it was doing nothing because the power cable was connected incorrectly, so, while my pc was still turned on I turned the power cable around and then the computer shutted down and won't POST again.
The RAM and PSU are still working, i tested them with other machines.