This is typically an easy and cheap fix, but is entirely hardware based. Potential issues range from a broken outlet or power adapter to a broken battery. For help on identifying the issue, and replacing the battery if necessary, visit this guide.

Its is likely a software issue that is easy to fix; however, it could also be a hardware issue. For help fixing this, starting with software and moving to hardware, please take a look at this guide

Your laptops backlight may be turned down or broken. The screen could also be broken or a cable unplugged. For help fixing this problem visit this troubleshooting guide.