More specifically, it is the hard disk that stores the operating system. Finally, a dead CMOS battery will also cause the red light to triggerīOOT: The red light near the BOOT indicator indicates that there is a problem with the boot device, which may be the hard drive. It may also be that the CPU fan is not plugged in properly. It may be that the CPU is not inserted correctly or one of the pins is bent. Those are:ĬPU: The red light near this indicator indicates that the motherboard cannot recognize the CPU, which may mean a variety of situations. Newer motherboards have four main indicators, and a red light will be located next to each label. Then, let’s see how to read the red Light on motherboard. Some motherboard manufacturers put a label on the motherboard to explain the problem. The specific error depends on the location of the motherboard and the red light. The red light is always on after the computer is turned on, but it generally does not turn on, cannot enter the bios, and does not display content on the monitor.
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