Remember, a failing PSU can damage other expensive parts like the motherboard or graphics card, so do not ignore this component. If the system boots after this, the issue was firmware-related rather than hardware.
PC Tower Not Turning On Fan: Troubleshooting Power and Startup Issues
Before you call a professional or resign yourself to a costly repair, understand that this symptom usually points to a specific, identifiable cause. A true "no power" state means absolutely nothing happens: no fans spin, no lights blink, and no fans hum.
If the fan does not spin, or if it spins inconsistently, the PSU needs replacement. Listening for the Cues Once the external power is confirmed, press the front panel button and become a detective of sound and light.
PC Tower Not Turning On Fan: Troubleshooting Power and Spin Issues
Locate the CLR_CMOS jumper on the motherboard, or remove the coin-cell battery for a few minutes, then reinsert it. You need to isolate whether the problem lies with the wall outlet, the power delivery system, or the internal components themselves.
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