S SK_tech Member Jul 11, 2025 #2 That usually means your PC can’t detect the CPU fan properly. Quick fixes: Check if the fan is plugged into the CPU_FAN port on the motherboard (not a different one). Open BIOS and see if the fan speed shows up there. If the fan is spinning fine, you can try resetting BIOS settings to default. Sometimes it’s just a loose wire or dust. Worst case, the fan sensor is faulty — but that’s rare.
That usually means your PC can’t detect the CPU fan properly. Quick fixes: Check if the fan is plugged into the CPU_FAN port on the motherboard (not a different one). Open BIOS and see if the fan speed shows up there. If the fan is spinning fine, you can try resetting BIOS settings to default. Sometimes it’s just a loose wire or dust. Worst case, the fan sensor is faulty — but that’s rare.
