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May 2, 2020 at 7:23 vote accept Pedram
Apr 15, 2020 at 20:48 comment added user57037 One possibility is that the wire is broken or almost broken and when you touch the wire it makes solid contact, but when you let go of the wire it makes intermittent contact. If that is the problem you can narrow it down by wiggling the wire deliberately in different places. Usually it is near a connector that the wire breaks.
Apr 15, 2020 at 13:52 comment added winny Welcome to EE.SE! Can you describe the sound? Is is 50/60 Hz with overtones?
Apr 15, 2020 at 13:51 answer added vu2nan timeline score: 1
Apr 14, 2020 at 11:36 answer added NoiseEngineer timeline score: 1
Apr 14, 2020 at 7:50 review First posts
Apr 14, 2020 at 9:57
Apr 14, 2020 at 7:49 history asked Pedram CC BY-SA 4.0