So basically today I took out my cpu to clean it and re apply thermal paste I put it back on turned on my comp and lone behold I have no picture or power to my USB ports yet all fans are coming on inc gpu and processor and heat is going to my processor and I'm not sure what is wrong I'm stumped I really need help what could cause this when I take the processor out it starts and shuts down immediately when I put it in it just stays on with no picture coming up or power to my USB ports pls help me