Do I Need New Comcast Box?

This is just happening today. My cable is showing video but no sound. When I push on demand button it tells me to call customer support and reort error 7. I can watch DVD and sound is okay.

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Answer #1: Posted by pellkiness on February 5th, 2011 6:55 AM

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pellkiness

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Error 7 is displayed when there is a problem with a weak or degraded signal going into the STB which is often caused by a loose/faulty connection going from the wall jack to the back of the STB (cable box). Don't assume that even though the fittings are screwed on tight that there is nothing wrong with the connection. The coax cable can work itself loose from the fitting. If Error 7 is displayed on all STB's then the degraded signal is more than likely coming into the home and will require a technician. Sometimes they can hit the signal over the phone, though - try the solution below, then call and ask them to hit the box, THEN have them send out a tech.

Try this: turn the STB off, then unplug the power cord. Unhook the coax cable from the back of the STB as well as the wall jack, then inspect the coax & make sure there are no kinks or damage. Verify that the fitting is not loose on the cable, then check the center conductor which looks like a metal pin at each end of the coax cable; it should not be bent nor have anything touching it. Push the center conductor into the small hole in the wall jack as far as it will go, then screw the fitting on tight and wiggle the part of the coax that is attached to the fitting to make sure everything is secure. Follow the same procedure on the STB, first verify that you are connecting the coax to the Cable In/RF In jack. Plug in the power cord, then turn on the STB. Usually in about 5 minutes On Demand will be available to access.
This technique is pretty effective in correcting this error.

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