CD or DVD doesn't load when inserted into the disk drive.

Keyboard isn't functioning properly, whether that be a slow response to key presses or the keyboard is completely...

Before you do anything, first check to see if the power cable is plugged fully into the wall as well as into your computer. If this works but the computer doesn't charge fully or dies quickly, then see the guide on how to replace the battery in your computer. If this doesn't work, you may need to buy a new power cable.