Of course, make sure your AC adapter is working properly, and that you have a good battery. Make sure all your connections are clean and properly aligned. I f any of this is okay, you will have to dis-assemble your computer. Follow [guide|3938|this guide.|page=7] In the last picture, you will see the DC connector. Unsolder the old one, and replace it with [http://www.amazon.com/Power-Jack-Acer-Aspire-5610Z/dp/B0040DDBIG|one of these] Here you can [http://www.powerjackrepair.org/aceraspire5100bl51.html|see what it looks like.] Hope this helps, good luck.