Lots of trouble all at once. Thought HD cable box was bad-turned out to be trouble outside at junction box. My Dennon Home Theatre unit went bad-needs repair. By passed all equipment and went directly from source to cable box to t.v.-worked fine for about 20 minutes then picture froze up (in black and white), then screen went completely blank. Presently, with the room darkened, I can see very light, blue screen on and hear a slight "buzzing" sound from the tv. Pushing the "On-Off" button on the set will not turn it off. Have held it down for up to 20 seconds and still will not go off. Same with remote. Really need some help to see what is problem with tv before I start repairs on the Dennon.
Thanks for listening, and, (I hope), the help!
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The black square is a text box for the deaf. You can turn it on and off with the closed captioning button on your remote or from the closed captioning section in your television's menu.
However if you are connecting a cable box or satellite tv receiver you would need to turn the text box off from its menu. There is often a hidden menu that needs to be accessed on the cable boxes and satellite tv receivers that can be reached by turning it off and then immediately pressing the menu button on the outside of it. For more details about a specific cable box or satellite tv receiver call your cable or satellite company.
One single cable runs from the circuit breaker to a junction box in that area of the house. The cable has a black Hot wire, white Neutral wire, and bare ground wire. Once the cable arrives at junction box, it can split up 2 or 3 directions. Each successive box receives a cable that feeds back to the first junction box.
Chances are the junction box is on the ceiling. And it will be the ceiling box that is closest to main breaker box. Junction box can also be a switch box. In that case it will be switch box closest to main box.
Find the junction box, as point of organization. Open junction box and separate all black and white wires. Turn power on and see if breaker sets. That will tell you if problem is between main box and junction box.
Junction box wires are separated. Tape tester leads to wood sticks to keep hands away from power. Turn power ON and test each wire in junction box to bare ground wire. Tester will light up on Hot wire. Test Hot to each other wire in box, except bare ground, and tester lights up on Neutral This identifies the cable that comes from breaker box.
Now, reconnect cable from breaker box to one of the other sets of black and white wires located in junction box. Check if breaker resets. If breaker resets, see what circuits are working, and you can eliminate them as suspect.
Remember each successive box in a circuit has 1 cable that connects back to main breaker box Going 1 box at a time, and disconnecting black and white wires, will eventually lead to the suspect.
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The first thing I would like you to check is the back of the HD box. There is a port that look similar to the HDMI port but its called SATA.
Just Double check that it is in the HDMI.
Once that we have established that the HDMI cable is correctly fitter both to the TV and the HD box. what I would like you to do is turn both box and Tv off. with them still connect to each other. Now what I would like you to do is turn your tv on first. Select the HDMI input you are going to be using. Then turn the power onto the box.
To have HD on cable, you will need an HD cable box with the HD service activated by the cable company. Some cable carriers will provide some basic HD services included in the base cost with the box.
From the HD cable box to the TV, you will need an HDMI cable between the cable box and the TV set. This is an HDTV interconnect wire. You will have to refer to the instructions on the cable box and on the TV to get everything going properly.
All conections to the set need to be check very carefully starting form the cable to comes into the cable box from the outside and the cable that goes from the box to the tv,eliminate the cable box and conect the wire from outside direct in the tv and and see how it looks bring a small portable and conect the cable to it to see how it looks,once all the possibilities have eliminated then consider a problem inside the tv in the tuner area starting at the very conector where the cable conects.All this can help if the double image is not related to misaligned convergence.