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This is a classic sign of a hot/neutral reverse or current being induced or shorted in to the coax. First step is to test your outlet and power strip. If you don't have an outlet tester that can indicate a hot/neutral reversal, use a multimeter to measure the voltage between the left prong slot on the outlet and the ground (assuming the outlet is oriented ...


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Near where the service enters the house, you should see a grounding block similar to this. The coaxial cable from the pole/dish/mast should be connected to one side, and the coaxial cable feeding to the house should be on the other side. The screw terminal should have an insulated copper wire, larger than 14 AWG, and shorter than 20' (6 m) attached. The ...


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( Do not directly touch anything conductive while doing the following test. ) As a quick check, test if there is voltage between the shield of the coax and the outlet. There should be no DC volts anywhere. The voltage between the coax and the neutral should be very near 0V AC. The voltage between the coax and the hot should be near 120V AC. If both checks ...


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The Hubbell single AC video/HDMI/audi gang box can be found here


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To check that the coax is grounded properly you need to measure between the outside of the coax cable and ground - preferably the ground pin of an outlet that actually has a ground. It should read 0v or close to it. If there are other properly grounded outlets you might be able to run an extension cable and use its ground to test. You should also measure ...


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Something is certainly wired wrong or malfunctioning badly. It could be the cable box. It is less likely to be the cable, but not impossible. Isolate the problem. Disconnect the cable from the cable box, and carefully use a voltmeter to check the voltage between the cable box's output and the TV's input. (The coax connection would be easier to check; ...


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I had my previous house wired for cable when it was built in 1996. The master cable signal was very weak. Continuity showed A OK. Turns out, and the installer called it right and crawled around the attic until he found it, that a nail had been driven through the coax. I really got my moneys with on that installation.



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