I have an Inspirion 1100. It's about 2- 3 years old. I just tried to start it up and It would not. All that happens is the fan runs for about 10 seconds  and the power light comes on the turns off. I have a U1223 battery but they don't seem to make this type any more and I am not sure if I should buy the type on th web site . So what should I do?