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[ The PC Guide | Systems and Components Reference Guide | System Case | Case LEDs ]

Power LED

The power LED is usually green and pretty simple: it comes on when the power is on. The wires from this LED are often combined with the keylock wires into a single 5-pin plastic connector, especially on older AT or Baby AT form factor PCs.

Power and hard disk activity LEDs on a typical case.

Original image Kamco Services
Image used with permission.

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