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Receiver humming and grinding sound...

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#1 of 2 OFFLINE   JayKellen


    Stunt Coordinator

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  • Join Date: May 22 2003

Posted February 16 2006 - 09:09 AM

I have an RCA 650 watt Surround Sound system, and for the past few months, every time I turn on my receiver, it makes a grinding noise. It usually stops after a few minutes, but it has me worried. I have had it for about two and a half years. I know this is not near top of the line, but it works great and the sound effects and such are crystal clear, but I do not know if this is the start of a major problem. Any advice? Thanks for any information you can give me.

#2 of 2 OFFLINE   Nhoj



  • 14 posts
  • Join Date: Jan 17 2006

Posted February 16 2006 - 08:18 PM

If it reliably goes away after a few minutes, I wouldn't worry about it.
Durings those first minutes, see if the sound can be mechanically affected by rapping on the side cover or pushing on the plugs. You may have a microphonic connection somewhere inside. This is usually because of bad soldering or a poor choice of conducting material, and likely to happen at a cold start. Hitting it can cause a burst of arcing within the bad connection and kick start the recovery.
This problem can last as long as your receiver without getting any worse. No need for panic.