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July 28th, 2025 22:21
Inspirion 3470 Power issue
Inspirion 3740 power supply light turns on but fan does not spin used switch method to test power supply fan worked. Issues is when power supply plug in by itself light comes on then turns off no fan.. when plugged into motherboard same thing..thing is the power supply was working fine everything turned on and all all of a sudden I get the problem mentioned above
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ejn63
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August 1st, 2025 18:19
No fan in the power supply or no fan in the case (probably on the CPU)? Or have both gone silent?
Tfli
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August 4th, 2025 20:35
@ejn63 no fan in the case the power supply fan only comes on with I bridge the green wire to the black wire but when connected to motherboard no power at all
ejn63
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29.2K Posts
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August 4th, 2025 21:29
Bear in mind the fan will only run when a setpoint in temperature is reached -- unless the fan never spins at all (it should briefly at powerup).