Sends the momentary signal to the motherboard to boot up or shut down the PC.

Because space inside a computer chassis is tight, it is best to plug the pins in from back to front, or row by row: Plug the connector into Pins 2 and 4 (Top Left).

Like the Power Switch, it is non-polarized. Plug it in either way. 3. Power LED (PLED or PWR LED) What it does: Lights up when the computer is turned on.

| Pin Number | Function | Description | | :--- | :--- | :--- | | | | | | Pin 1 | Hard Drive LED (+) | Connect the Positive (+) wire (usually white or colored). | | Pin 2 | Power LED (+) | Connect the Positive (+) wire. | | Pin 3 | Ground | Common ground for LEDs. | | Pin 4 | Hard Drive LED (-) | Connect the Negative (-) wire. | | Pin 5 | Ground | Common ground. | | Row 2 (Bottom) | | | | Pin 6 | Power LED (-) | Connect the Negative (-) wire. | | Pin 7 | Power Switch | Connect the Power Switch wire (polarity does not matter). | | Pin 8 | Ground | Common ground. | | Pin 9 | Reserved / Key | Missing Pin (No connection). | | Pin 10 | Reset Switch | Connect the Reset Switch wire (polarity does not matter). |

Remains solidly lit when the system is powered on and flashes when the system is in sleep mode.

To rule out a broken case button, touch the flat tip of a metal screwdriver across Pin 6 and Pin 8 for one second. If the system boots up, your motherboard is fine, but your case's physical power button or its cable is defective.

Before you begin plugging in cables, you need to locate the correct pin header on the motherboard.

Because this is just a momentary switch, orientation does not matter . You can plug it in facing either direction. 2. Reset Switch (RESET SW) What it does: Forces the PC to reboot when pressed.

The Reset SW cable is misconnected to the Power SW pins, or your specific case button is shorted.

Always remove the power cord before touching the motherboard pins.

Plug the "HDD LED" connector onto pins 1 and 3 on the bottom row, ensuring the colored wire aligns with Pin 1. 4. Power LED (PWR_LED / P_LED) Pins: 2 (Positive) and 4 (Negative) Polarity: Crucial.

If you've connected everything but your PC won't boot, double-check these common issues: