Step 4: If it doesn’t work correctly, you need to get a new PSU for the red light to stop flashing on your motherboard. Check whether it’s working by placing it on the working PC. Step 3: Unscrew the PSU and remove it from the system. Step 2: Make sure you disconnect all cables between the power supply unit (PSU) and other hardware, including the motherboard. Step 1: Unplug all the connections before opening the system’s case. To troubleshoot your PSU for a flashing red light on your motherboard, follow these steps: If the motherboard continues to flash a red light, the solution is to troubleshoot the power supply. So the best attempt you should consider making is reconnecting all the power cables. If the red light illuminates on the CPU-labeled LED, here are the possible causes: CausesĪ CPU red light on most motherboards I’ve had to deal with, particularly Asus motherboards, is the fault of the power supply because it powers the motherboard. In most cases, the cause of the red light stems from a problem with your CPU. If the red light is on in any of these areas, there are different approaches to solving the issue: The CPU red light on the motherboard These four LEDs are usually labeled CPU, Boot, VGA, and DRAM. I have put together this extensive guide to cover all possible causes of the red light on the different common motherboard brands, including Asus, MSI, Gigabyte, and Asrock, and the various ways you can troubleshoot and make the light disappear-from the no-brainer to the tall order fixes.Īs you probably know, most motherboards feature a dedicated set of LEDs that come on when there are hardware errors, especially errors related to the booting process. Is the red light flashing? Is it static? Does it come on, and then you get no display?
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VGA Light On Motherboard ASUS, How To Fixĭiagnosing the root cause of that red illumination you see on your motherboard also starts by observing the blinking sequence of the light.
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