I had my uncle replace my keyboard and backlight inverter and it worked fine, excpet the touch pad wasnt working. He took the laptop apart and tried to figure out what was wrong, but when he tried to turn it on again, it wouldn't turn on at all. The orange light is on (meaning it is charging or plugged in, or whatever.) When we press the power button, the fan starts...the green power light comes on...but the screen is still black and then it just shuts down right away....and the green power light goes back off. (This was not a problem at all before he replaced the inverter and the keyboard. The computer worked fine, but was missing keys and then the backlight went out....but everything else was fine.) What could be wrong??? I have unplugged and replugged in all connections that I can find (although I am not very computer savy.) I want to add that is is an Acer Aspire 5610. It is about 14 months old. It is not hot and over heating...it wont GET hot because it won't turn on. Actually, it is as if I were trying to turn it on with a dead battery in it...but, the battery doesnt even charge anymore so it always has to be plugged in. Grrrrrrrrrr! I am so frustrated with this computer. Thanks for your help!!!