Question about Marshall Amplification Marshall JVM410H 4-Channel Guitar Amp (with Footswitch)
Posted by Anonymous on
Test if it does it with the guitar cable unplugged from the amp. If it does, then it is time for servicing... If not, then you have a system grounding problem and the guitar cable is "leaking" signal into the amp. This can happen even if guitar is NOT connected.
Posted on Mar 14, 2011
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Posted on Jan 02, 2017
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