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3.9 Member Questions·Why does every TV in my house have a horizontal bar that moves up the screen?
·Do cable modems die slowly or quit like a light bulb?
·I had a cable modem that I had to reset all the time.
·Would a converter purchased on E-Bay or elsewhere work properly with my cable?
·What is a ground block?
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I had this problem in my house and after a lot of experimenting was able to track it down to the cable running into the house was running too close to the electrical. The cable was wire-tied to the main electrical feed for the house on the outside, and running over the top of the electrical box in the basement. After replacing the feed into the house with RG-6U, drilling a new hole into the house, and running the cable a few feet from the electrical, the problem went away. My advice for troubleshooting, try attaching a single TV to the cable feed on the outside of the house first. I did that by simply running some RG-6U out the door on the ground and connected it directly to the feed from the pole and to a TV. If the horizontal bar (hum bar) goes away, the problem is most likely caused by a cable wire somewhere running too close to electricity.
(Thanks for fmook for this one.)
Editor's Note: That horizontal bar is called a "hum bar".
Note by Tech3912  : Also bad crappy amps will do this as well. We see it alot as techs becuase ppl go to radio shack and get screwed... :)
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by Raydr
last modified: 2005-05-17 10:41:08 |
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I think in most cases, anything electronic will die suddenly when a component quits working.
However, say you have a component in the cable modem that only malfunctions when it gets hot....and each time it malfunctions sooner and sooner, it's eventually going to stop working.
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by Raydr
last modified: 2005-05-17 10:37:39 |
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Most likely a signal issue. See modem troubleshooting section.
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by Raydr
last modified: 2005-05-17 10:38:22 |
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No. Comcast, like almost all U.S. cable companies, will not activate a box that is not rented from them. This is due primarily for security concerns.
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by mbernste edited by Raydr
last modified: 2005-05-17 10:40:30 |
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A ground block is a item generally placed on the outside of a residence between the cable drop and the internal wiring of a home. A ground block bonds the sheild of coax to the electrical ground of the residence. A ground block is usually connected by solid copper to either a cold water pipe or to the ground of the electrical service drop.
In the attached image the large arrow points to the ground block itself, while the smaller image points at the ground connection.
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by Axilla
last modified: 2009-01-21 22:34:38 |
