Posted: 6/21/2009 4:17:45 PM EDT
| Alright, I've got Comcast and several months back picked up a Samsung HDTV(Full 1080P) and then upgraded to Comcast's HD service. Worked great, picture quality alot better than the standard channel. Recently some of them haven't been coming in at all. Like for example standard Fox looks like crap compared to the HD Fox channel, but half of my HD channels are no longer coming in at all and on some it doesnt' appear any better than the standard channel plus it comes in choppy and broken up. Any ideas? I've reset the receiver box a couple of times with no success. |
| Sounds like weak signal from the cable company, I had the same problem when I first got my HD set, it would work fine during the day, but when it got cold at night the center conductor of the coax outside would shrink back just enough that the HD signals would quit but the standard channels would work fine. |
| Negative on the DirectTV, lol. The most calling Comcast does is make sure there's a good signal going to my place and give you common sense tips. If that doesn't work there send out a technician. Just asking if anybody knew what it could be on my end before I have people coming over. I also have a 18 month old son who in all likely hood could have hit buttons that did it but again just checking. |
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I should clarify, the cable provider can ping your box to make sure it's got a proper signal. If they have a problem there, they can send someone to look at your wiring if you can't do it yourself. They are responsible for getting a good signal to the side of your house, from there in is all you.
They can also tell you if there has been recent service work or new construction in your area that might be affecting service. Try a new cable jumper from the wall to the box as well. |
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common causes:
- you added more splitters or old ones not capable of the 5-1000mhz bandwidth - shitty in-wall wiring, RG6QS is what you want, preferably home runs from each room to where the cable enters the house in one large splitter - they connected more people at the pole, ask to be moved to another pole or have them boost the signal - the wiring to your house or in your house is damaged, have it replaced (outdoor) or replace it yourself (indoor) - poor connection from STB to TV, get yourself a well made HDMI cable 1.3a, monoprice has them for like $5, get a bunch for your friends - someone switched your inputs on the TV (on the HD channels do you get sound and no picture?), disconnect every output from the STB EXCEPT the HDMI cable, set your TV to HDMI - you're signal is too strong, common when people are using power amplifiers to compensate for shitty wiring you can check your signal strength by entering debug mode on the STB - tune to a digital HD channel (any of the HD in the 200s will do) - on the remote, hit power to put the STB in standby - then immediately hit 'OK/Select' if you navigate through the diag menus you should be able to see the signal strength... +/- 10dB is plenty of strength for HD, Internet, etc... if your signal is within the +/- 10dB range, then get a new STB or check the wiring/input to your TV... anything outside the 10dB range call comcast and have them check your signal strength where it comes in the house my best guesses are: - someone switched the inputs on your TV - the wiring to your house is damaged or old - the STB is defective |
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Quoted:
common causes: - you added more splitters or old ones not capable of the 5-1000mhz bandwidth - shitty in-wall wiring, RG6QS is what you want, preferably home runs from each room to where the cable enters the house in one large splitter - they connected more people at the pole, ask to be moved to another pole or have them boost the signal - the wiring to your house or in your house is damaged, have it replaced (outdoor) or replace it yourself (indoor) - poor connection from STB to TV, get yourself a well made HDMI cable 1.3a, monoprice has them for like $5, get a bunch for your friends - someone switched your inputs on the TV (on the HD channels do you get sound and no picture?), disconnect every output from the STB EXCEPT the HDMI cable, set your TV to HDMI - you're signal is too strong, common when people are using power amplifiers to compensate for shitty wiring you can check your signal strength by entering debug mode on the STB - tune to a digital HD channel (any of the HD in the 200s will do) - on the remote, hit power to put the STB in standby - then immediately hit 'OK/Select' if you navigate through the diag menus you should be able to see the signal strength... +/- 10dB is plenty of strength for HD, Internet, etc... if your signal is within the +/- 10dB range, then get a new STB or check the wiring/input to your TV... anything outside the 10dB range call comcast and have them check your signal strength where it comes in the house my best guesses are: - someone switched the inputs on your TV - the wiring to your house is damaged or old - the STB is defective This is all sound advice. As a former Comcast video support rep, I dealt with such issues on a daily basis. The #1 cause, however, was a loose or dusty coax cable. Check it on both ends. Otherwise, call and have a tech come out. |