What is red light on motherboard?

A red light on the motherboard usually indicates a hardware issue—common causes include problems with the CPU, RAM, GPU, or power supply. Check the user manual to identify the specific error based on light location.
 
A red LED light on a motherboard usually signals a hardware fault. It could indicate issues with the CPU, RAM, GPU, or power supply. Most motherboards label the lights (e.g. CPU, DRAM, VGA, BOOT), so you can diagnose which component is failing. Always turn off power before troubleshooting.
 
A red light on a motherboard typically indicates a hardware issue, such as problems with the CPU, RAM, GPU, or power supply. Many motherboards have diagnostic LEDs that light up when a specific component isn’t functioning properly. The exact meaning depends on the location and label of the red light—checking your motherboard’s manual can help identify the issue more precisely. It's often one of the first signs during the boot process that something needs troubleshooting.
 
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