Reset switch: two feet. The plug of this switch is usually marked with the word RESET SW, and the English abbreviation near the pin on the main board is generally RESET, RST, RS or RE. Regardless of the positive and negative, the insertion is also effective.
Power light: The connection is also a two-pin plug. One of the wires is usually indicated by green and the other is white. When the main unit power is turned on, the power light will light up. The plug of this switch is usually marked with the POWER LED, and the English abbreviation near the pin on the main board is generally PW LED, Power LED, PWR LED or PLED+ and PLED-. If it is reversed, it will not light up, just change it.
Hard disk light: The hard disk light connection is also a two-pin plug. The two wires are usually red and white. When the hard disk has read and write action, the hard disk light will light up. The plug of this switch is usually marked with the HDD LED, and the English abbreviations near the corresponding pins on the main board are HDD LED, HD or IDE_LED+ and IDE_LDE-. If it is reversed, it will not light up, just change it.
Speaker: This connector has four pins, but only two wires. The color is usually red, black or orange and black. It is connected to the speaker on the chassis after it is properly connected. The word "Speaker" is usually marked on the plug of this switch and the corresponding pin on the main board. Some computers will make a "beep" sound through the speaker after normal startup, or if they can not start normally, the corresponding alarm sounds through the speaker to help the user solve the problem. However, some motherboards have integrated speakers, so you don't have to connect the speakers on the chassis.