[Solution] Lenovo desktop. The configured keyboard F1 to F12 is not the default one, for example, F5 is sleep, rather than refreshing. You need to press the FN key to work properly.

On the keyboard, the default function of the F series buttons is Rename and refresh, and FN + F2 and F5 are other auxiliary functions. However, for this Lenovo keyboard, F1 is a silent keyboard by default, F2 is a volume reduction by default, F3 volume plus, F5 standby, and you need to work with FN to implement functions such as renaming and refreshing, in turn, how can I return to the normal state?

 

There are three solutions:

1. Change the keyboard. This solution is the best, because Lenovo's keyboard is of poor quality.

2. Set BIOS. Different devices seem to be different. In startup/option keys display style, set it to legacy.

3. Install the Lenovo keyboard driver and a program named Lenovo low profile USB keyboard in the menu. Run the program and modify it as prompted. However, the effect may be the opposite. Try multiple times.

 

Lenovo is a good thing to do.