I have an Acer Veriton M460, I recently replaced the motherboard on it. plugged everything in and then plugged the power in. It immediately started running. The fan for the processor and power supply started to spin but I never had to push the power button on the front. When I look at the button the light never lit up and when I would push the button it wouldnt do anything. When I held the power button in, it wouldnt shut down the computer. To shut it down I would have to pull the plug. Now whenever it would turn itself on automatically, I never heard any beeps or anything, the fans would just start running. So I disconnected everything that wasnt esential, USB's etc plugged it in, still the same thing, unplugged the power button same thing. I pulled that motherboard out and stuck the old one in, *which would work sometimes but not all the time I at least would get some beeps* and the exact same thing happened. Does anyone have any idea what is going on?