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Fan still running after power is unplugged. For 15 minutes!!!

post #1 of 5
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I have the cooler master elite 430 case and it came with one blue led fan in front

It was originally attached to the motherboard and after shutdown, the LEDs are still on and the blade is running at minimum rpm. I even used my finger to stop the blade and it spun on. When I unplugged the fan from the motherboard, it immediately shut off.

Then I used a 3pin to molex connector and connected the fan directly to the power supply. The same thing happened. I switched off the power supply and unplugged it from the wall and the fan continued to spin for 15 min....and kept going before I got impatient and I unplugged the fan.

My power supply is a Cooler Master extreme 500w

Any idea why this is happening?
~7-7-7~
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~7-7-7~
(13 items)
 
  
CPUMotherboardGraphicsRAM
Phenom II x4 955 BE Asus M4A79T Deluxe Evga GTX 275 896 MB @ 710 core 6144 MB 
Hard DriveOSMonitorPower
Seagate Barracuda 1.5 TB Windows 7 Ultimate x64 & Windows XP SP3 Acer AL1916W Raidmax 630W 
Case
Raidmax Aztec 
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post #2 of 5
that's awesome, I wish mine did that.
    
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3570k@4.5ghz 1.21v Gigabyte Sniper M3 Sapphire 6950 Samsung 8g1866 
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Samsung 830 Samsung F1 500 Crucial M4 64 (SRC) cpu:Noc NF-F12 / case:4x TY-141/gpu: 2x NB-Multi 
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Venomous X, Accelero TT Win 7 64 Acer X213H Saitek Eclipse 
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Superflower 650 plat Fractal Arc Midi G500 
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CPUMotherboardGraphicsRAM
3570k@4.5ghz 1.21v Gigabyte Sniper M3 Sapphire 6950 Samsung 8g1866 
Hard DriveHard DriveHard DriveCooling
Samsung 830 Samsung F1 500 Crucial M4 64 (SRC) cpu:Noc NF-F12 / case:4x TY-141/gpu: 2x NB-Multi 
CoolingOSMonitorKeyboard
Venomous X, Accelero TT Win 7 64 Acer X213H Saitek Eclipse 
PowerCaseMouse
Superflower 650 plat Fractal Arc Midi G500 
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post #3 of 5
Most likely capacitors are holding a charge even when turned off, and its supplying power to fans, which don't draw much, causing that 15 minute run time.

Most capacitors have a bleeder resistor that should stop that, so your PSU may be faulty.
post #4 of 5
its not a bad thing.... if anyhting is unsures your compents are cooled down properly... do any of the other fans do that?... it does sound like a psu thing
post #5 of 5
After you unplug the PSU hold the power button for a second and it should stop, if it it's caused by the PSU.

(That is really an easy safety precaution to use before going into your case anyway, before plugging the PSU back in for grounding.)
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COMPUTER
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CPUMotherboardGraphicsRAM
3570K Gigabyte GA-Z77X-UD3H Gigabyte GTX 670 Windforce OC 2GB Samsung 30nm 
Hard DriveHard DriveCoolingOS
WD Caviar Blue WD Caviar Black NZXT Havik 140 Windows 7 64bit 
OSMonitorKeyboardPower
Windows 8 64bit ASUS GD235HZ (GD245HQ) 120Hz Dell OCZ GameXStream 850W 
CaseMouseMouse PadAudio
Corsair Carbide 300R Logitech G9 naked Allsop Black Cloth (low profile) Logitech G35 Surround 
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