Hi, today I put in a new cpu into my motherboard but to find out it didn't work. I put in my old cpu back into my motherboard and now it show anything anymore. Usually, the power button lights up when I press it but now it doesn't. The cpu fan and PSU fan still goes on. Also whenever I press the button on the back of PSU it automatically starts the computer. I have tried putting the cpu back in and out over 10 times but to no avail. Please help me