I am building a computer and its all together and it says "please check signal cable" then off mode in 5 seconds. This was the "exact" problem with my last computer which was getting a little old so I decided to build a new one. I have a new motherboard, cpu, ram and video card. The only parts from the old computer with the duplicate problem are the disk and the true blue 480w power supply. Could it be one of theses two parts that are bad or what do you think the problem is. THANKS!