I have a Gateway, but I don't know what the model is anymore. I bought it in late 2010 and can give you numbers to determine what it is. I run Windows 7. My computer will not turn on. I press the power button several times and it has taken longer and longer for it to respond. It doesn't seem to turn on unless it is plugged in (but no battery drainage has occurred). When it seems it has successfully turned on the screen will remain black and I have to do a hard shut down. I have tried to start it up while the batter was out and that did not work. Today I started it up and the fan went on but only for a second or two and then almost seemed to freeze. After about 15 minutes of trying (letting the cord stay plugged in to see if it was the battery) it finally turned on. I am afraid to turn it off for fear that it won't ever turn back on again. I can unplug the computer and it will stay on just fine.
As of now, I will just leave it on, probably take the battery out so it doesn't fry. I ran a thorough virus scan to see if that might have been the problem but everything comes up clean.