Question: My system (AM1/ FM2/ FM2+) won't boot up after 5 long beeps when only a CPU is installed. How do I resolve this problem?(3/1/2015) Answer: 5 long beeps mean that the system couldn't recognize the graphics.
Some AMD CPUs (i.e AMD Athlon/Sempron family CPU) don't have integrated graphics processors. When these kinds of CPUs are installed, a discrete VGA card is required. Please visit AMD's official website to check whether your CPU has integrated graphics or not: http://products.amd.com/en-gb/DesktopCPUResult.aspx