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Receiver humming and grinding sound...


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#1 of 2 OFFLINE   JayKellen

JayKellen

    Stunt Coordinator

  • 76 posts
  • 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

Nhoj

    Auditioning

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  • 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.

Cheers
Nhoj