Receiver humming and grinding sound...

Discussion in 'AV Receivers' started by JayKellen, Feb 16, 2006.

  1. JayKellen

    JayKellen Stunt Coordinator

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    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. Nhoj

    Nhoj Auditioning

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    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
     

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