I have an eMachines T2642 system and a week ago when I went to go upstairs to use it, it was off, so I pressed the power button to turn it back on, and nothing happened. Then I noticed a kind of high pitched noise coming from the power supply, so I figured we had some sort of power surge and it blew the power supply. So I bought a new one, put it in, and still, nothing happened, but there wasn't any kind of noise coming from this power supply. So I searched on this forum and tried taking the battery out of the motherboard and resetting some stuff, but still nothing. So I figured the motherboard went with the power supply. So I purchased a new one, just installed it, hooked up the power, and it still will not turn on. Oh, and the green light on the ethernet port comes on, so does that mean some power is getting to it? Any ideas on what this could be? I am going crazy with this thing. Thanks.