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Windows 7: sound crackling

08 Feb 2016   #1
brian4274

windows 7 64bit
 
 
sound crackling

sound cracking when starting windows or shutting down windows...sound does not crackle after windows has started...i am using an external usb sound adapter...when i use the built in realtek sound it hums...i am wondering if it is the video card or power supply


My System SpecsSystem Spec
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08 Feb 2016   #2
fireberd

Windows 10 64 bit
 
 

More information is needed. What is the USB Adapter? Does it hum with PC speakers AND headphones or only with speakers? What is the motherboard model and what is the on board sound?

Startup/shutdown, depending where in the process the sound is activated, could be the issue especially with USB devices as power is applied to the USB port or powered off.
My System SpecsSystem Spec
08 Feb 2016   #3
brian4274

windows 7 64bit
 
 

i noticed last night when i unplugged the power supply cord it made a loud noise and then i plugged in a different cord it made a loud noise too...not a crackling but a loud banging sound through the speakers...only happens when i unplug/plugin in cord or turn power supply off using the sitch at the back

i hope it is not the motherboard....the motherboard/cpu/hard drive/burner/memory is new...the power supply is used
My System SpecsSystem Spec
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09 Feb 2016   #4
fireberd

Windows 10 64 bit
 
 

Where was the noise when you unplugged or plugged in the PC's power supply cord? In the PC itself or in the speakers? Just unplugging or plugging in the power supply should have no affect on anything. If it does, either the power supply is defective or you have some type of grounding problem.
My System SpecsSystem Spec
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 sound crackling




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