With laptop batteries (e.g., Dell and Lenovo), a blinking or flashing LED light that's green or orange indicates an issue related to the battery. As the card is used (e.g., browsing the Internet), data is sent to and from the network card, and the LED flashes to indicate communication. However, when a cable is connected, the LED lights up as a solid green LED. For example, it shows an orange LED or no LED without a cable connected to a network card. The LEDs on a network card, network switch, and network router indicate when a connection is made and when data is being transferred. Network card, Wi-Fi, switch, and router LED To find the meanings of these LED numbers and letters, reference your motherboard manufacturer manual. For example, a Q-Code of "5A" indicates an internal CPU error. For example, ASUS motherboards have a Q-Code LED that displays a two-character hexadecimal code to indicate the motherboard's state. Some motherboards have an LED that creates a number to indicate a POST code or status code that indicates the state of the motherboard. When the power cable is disconnected from the computer, the LED light stays on for several seconds and then slowly fades off, which is normal. The picture shows an LED/ PLED between the PCI slots on a motherboard. The LED may also be used to inform users of errors. Many motherboards have an onboard LED that lets users know the motherboard has power. On the Logitech MX mouse, an LED on the bottom indicates what computer it's using (1, 2, or 3), and another LED on the left side shows its charging status. For example, on the Logitech m705, the indicator is on the top center of the mouse. The location of this LED varies by mouse. Most computers today use an optical mouse with an LED to help track the mouse pointer on the screen.Ī LED indicator may show when a wireless mouse is turned on or while it's charging. If you have difficulty deciphering the symbol, press each key to see which LED illuminates. Finally, for the Scroll Lock, the symbol may be an arrow or an arrow and a lock. The symbol may be a letter or a letter and a lock for the Caps Lock. For example, the symbol may be a number or a number with a lock for Num Lock. The symbols can vary for keyboards that have symbols next to the LEDs. Apple keyboards and others have the Caps Lock LED indicator on the Caps Lock key and may not have other indicators because there are no Scroll Lock or Num Lock keys.
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