I bought this 17" Dell Inspiron 1720 just over a year ago. A week ago I was using it and everything was running just fine. I turned around to do something, for less than five minutes and when I returned the computer was turned off. I pressed the power button, no power, no lights to indicate any power is going to the unit. I checked my power supply, tried different power outlets to no avail. When I would plug the power supply in the green light would come on indicating the unit was working, but as soon as I plugged it into the back of the laptop, (when I put my ear to the power supply) there would be a little zap and the green light would go out. Thinking it was the power supply, I had some friends bring over their Dell power supplies. The P-10, two prong power supply. It did the same with theirs. The next thing I checked was to see whether or not the battery had any power left. It did. When I pressed the button on the back it had 5 lights indicating it was full. So, before I go and have to more than likely shell out lots of money to someone to fix it, I would like to know if any one else has come across this same thing and what it may be. Thanks.