If your arrow keys are not working in Excel, there are a few simple ways to troubleshoot and solve this problem. The most common solution is to turn off Scroll Lock. If you don't have a Scroll Lock ...

On PC keyboards, a key used to toggle between a scrolling and non-scrolling mode. When on, the Arrow keys scroll the screen regardless of the current cursor location. This key is rarely used for its ...

The Fusion documentation states that the F15 key is mapped to scroll lock - but I'm pretty sure that key isn't on laptop keyboards. You might need to use an external keyboard.