What does the three flashing lights on the keyboard represent, and what is the third light on the ke

The first one is num to control the keypad, press num lock and it won't light up The keypad can't be used normally The second one is caps, which is case-sensitive, and if you press capslock, it won't light up. The third is that Lock was very useful in the DOS period, due to the display technology at that time, the screen was limited to 80 characters wide and 25 lines of text, and when reading documents, it was very convenient to use this key to scroll the page. With the development of technology, the Scroll Lock key has become less and less useful in the Windows era, but it is still somewhat useful in Excel:

If you use page turning keys (such as page up and page down) with scroll lock turned off, the selected area of the cell will move accordingly; Conversely, if you want to scroll without changing the selected cells, just press scroll lock. Press scroll lock and it won't light up

The first one on the left is the number lock, the second one is the caps lock, and the third one can be pressed in the middle of the three keys under the light and it will light up.

The number lock is that the number can't be typed, the second is the uppercase lock, and the third is the scroll lock.

The third light above the keyboard is the scroll lock light.

If you want to enable this function, you can press the "Scroll Lock key", and the "Scroll Lock key" is usually located on the right side of F12.

After pressing this key, when you press the up and down keys to scroll in excel, etc., the cursor will be locked and the page will be scrolled; If you let go of this key, pressing the up and down keys will scroll the cursor and lock the page.

This function key originated in the DOS era, when the screen could display 25 lines per screen with 80 characters per line due to the display of characters, and the scroll lock key was used to scroll over long documents, just as many web pages are scrolled through with a double mouse click to make it easier for visitors. But in the Windows era, the scroll lock key basically retired from the stage of history.

The three indicators on the keyboard are fully lit, indicating that the three function keys of Caps Lock, Num Lock, and Scroll Lock are enabled.

What these three function keys do:

1、caps lock：

caps lock is an English case conversion switch,When pressing this button, the indicator light will light up,At this time, the input English will appear in the form of uppercase,The light will go off after pressing again,And all typed English will also return to lowercase,Because you often need to convert case when typing,This is also one of the three shortcut keys commonly used。

2、num lock：

The function of this light is more of the keys we need to use when entering some passwords, and the number keys in the keypad area can smoothly output the corresponding numbers when pressing and lighting up the indicator light. It is mainly responsible for the opening of the numeric keys of the numpad.

3、scroll lock：

Compared with the last two buttons, the role of this light is much smaller, and we only use this button when we carry out **. When doing Excel, the user uses the arrow keys to scroll, and the cursor will move with the page, and when the scrolllock key is pressed to move again, the page scrolls as usual, and the cursor stays in place.

The keyboard light keeps flashing for the following reasons:

1. Keyboard problem: If there is a problem with the internal chip of the keyboard, the solution is to replace the keyboard;

2. Socket problem: If the socket is damaged, the contact is poor or the power supply is insufficient, the keyboard light will be flashing all the time, and the solution is to repair the pure local socket or reduce the socket power supply.

to solve the problem of insufficient power supply;

3. System drive problem: It is not a problem of the boring system, it is the incompatibility of the driver of the human input device, and the solution is to try to replace the driver.