I'll keep it simple. I install my Radeon 2600 into the pcie slot and turn on my computer. Everything powers on, but it will not boot and the monitor stays black. It runs for a few seconds and then shuts itself off....then it turns back on by itself. It goes through this on/off process 3 times and on the 3rd "cycle", it stays on but still nothing on the monitor. No error beeps either. Just...nothing! Everything is powered on. I remove the card and it boots with no problem. I tried this card in my brother's PC and it works perfectly. What am I missing here?