http://www.dslreports.com/forum/Cable-voltage-on-coax-23303581 en Sat, 11 Feb 2012 14:49:59 EDT Sat, 11 Feb 2012 14:49:59 EDT http://www.dslreports.com/forum/Re-Cable-voltage-on-coax-23550918 http://www.dslreports.com/forum/Re-Cable-voltage-on-coax-23550918 Sun, 27 Dec 2009 16:39:37 EDT http://www.dslreports.com/forum/Re-Cable-voltage-on-coax-23549427 said by wile e cat :

Oaky I have found out more, I am getting feed back voltage from the tv's going back onto the cable grid for the house.
It's called a "hot chassis" condition, your TV is defective. Remove the unit from service and/or get it repaired.

**The condition is potentially lethal!** (Not to mention a fire hazzard)
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[Insert Comcast employee disclaimer here.]]]> http://www.dslreports.com/forum/Re-Cable-voltage-on-coax-23549427 Sun, 27 Dec 2009 08:54:54 EDT http://www.dslreports.com/forum/Re-Cable-voltage-on-coax-23543952 http://www.dslreports.com/forum/Re-Cable-voltage-on-coax-23543952 Fri, 25 Dec 2009 12:08:32 EDT http://www.dslreports.com/forum/Re-Cable-voltage-on-coax-23328016
I remember a thread some time ago about LCD sets doing this. I think the cause was a power supply design problem, but I can't remember the solution. Not even sure it was on this board. ]]> http://www.dslreports.com/forum/Re-Cable-voltage-on-coax-23328016 Wed, 11 Nov 2009 20:40:32 EDT http://www.dslreports.com/forum/Re-Cable-voltage-on-coax-23323295 I have also learned that this part of the house is old knob and tube wiring. The whole house was working fine until the plumbers changed alot of pipes. A new ground wire was pulled to the water meter and two ground rod installed. I also changed the service feed from the weather head to the panel.

thanks for all of your inputs on this... wile e cat]]> http://www.dslreports.com/forum/Re-Cable-voltage-on-coax-23323295 Tue, 10 Nov 2009 22:52:11 EDT http://www.dslreports.com/forum/Re-Cable-voltage-on-coax-23307604 said by manboy :

what do you need a electrician for? It sounds to me that a surge might have gone through and smoked the gate diode inside the tv. What would a sparky look for?
So what Voltage and Current is showing up on the coax, where is it coming from, is there a chance someone could come in contact with this current and somehow contact a grounded surface? If so, can you explain to the OP what could happen next? :huh:
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I know you think you understand what you thought I said, but what I'm not sure about is that what you heard isn't exactly what I meant.]]> http://www.dslreports.com/forum/Re-Cable-voltage-on-coax-23307604 Sat, 07 Nov 2009 19:15:01 EDT http://www.dslreports.com/forum/Re-Cable-voltage-on-coax-23307583 http://www.dslreports.com/forum/Re-Cable-voltage-on-coax-23307583 Sat, 07 Nov 2009 19:08:29 EDT http://www.dslreports.com/forum/Re-Cable-voltage-on-coax-23307580
While you are at it make sure incoming feed is bonded to building ground as recommended by ArgMeMatey . If let your CATV provider know.

With the external feed disconnected is the voltage still there? Assuming you have more then one device connected to the coax disconnect them and measure each one individually.

Do you know if there are any pre-amps or line amps remotely powered via the coax. For example we use an outdoor antenna with a preamp, the power supply is inside.

/tom]]> http://www.dslreports.com/forum/Re-Cable-voltage-on-coax-23307580 Sat, 07 Nov 2009 19:07:56 EDT http://www.dslreports.com/forum/Re-Cable-voltage-on-coax-23306572
Have you disconnected the house from the cable drop and checked the house side, with TVs attached?

Drop disconnected, TVs disconnected?

Drop connected, TVs disconnected?

Is the "cable TV ground" bonded to the power company ground?

Have you checked each TV and other RF-connected device to see if any of them are putting out voltage under different conditions?

In other words, is the voltage coming from the cable company's plant, or from a device or connection in the house?
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Geocoder]]> http://www.dslreports.com/forum/Re-Cable-voltage-on-coax-23306572 Sat, 07 Nov 2009 14:05:50 EDT http://www.dslreports.com/forum/Re-Cable-voltage-on-coax-23304159 http://www.dslreports.com/forum/Re-Cable-voltage-on-coax-23304159 Fri, 06 Nov 2009 20:26:36 EDT http://www.dslreports.com/forum/Re-Cable-voltage-on-coax-23304035 http://www.dslreports.com/forum/Re-Cable-voltage-on-coax-23304035 Fri, 06 Nov 2009 19:51:28 EDT http://www.dslreports.com/forum/Re-Cable-voltage-on-coax-23303809 ]]> http://www.dslreports.com/forum/Re-Cable-voltage-on-coax-23303809 Fri, 06 Nov 2009 19:05:12 EDT http://www.dslreports.com/forum/Cable-voltage-on-coax-23303581 http://www.dslreports.com/forum/Cable-voltage-on-coax-23303581 Fri, 06 Nov 2009 18:02:12 EDT