Cable jack is connected through the comcast box and then hdmi cables are connected from the comcast box to the tv. The cable jacks on the tv do not work. The picture was clear and then it cuts in and out and turns fuzzy. is it the lamp or is it dirt or dust in the tv causing it to cut in and out?

Check your connections between your Roku box and your TV more than likely you have the audio cables plugged into the wrong jacks, Using a single HDMI cable would eliminate this issue if you have an available HDMI input on your TV. Notice which jacks are the audio output jacks on this pic, make sure these are connected to the input on your TV, the ONLY time you don't use these jacks id if you are using the HDMI connection, they are REQUIRED for composite video, component video (high def color) and S-video.

Things You’ll Need:

• HD television
• HD satellite or cable receiver
• DVD player
• Stereo receiver
• AV cables
• Cable connector
• HDMI cables

Step1Examine the back of your HDTV. You will see a series of input jacks for AV cables, (typically color-coded white and red for audio and yellow for video), as well as an antenna input and one or more HDMI input jacks. There will likely be a number of them, but each one should be distinguished with a label ("video," "cable" or something similar). Step2Attach the cable connector from the cable or satellite receiver to the antenna input on the back of the TV. Step3Connect the AV cables to the DVD player, VCR, stereo receiver or whichever other component you wish to connect to the television. The cables should line up by color: place the white cable in the white input jack, the red cable in the red input jack and the yellow cable in the yellow input jack. All three cables from each component need to go into the same label input jacks. Usually, they will all line up in a vertical row. Step4Find the HDMI output jack on your receiver or DVD player (some receivers will not have them--they are necessary to receive a high definition signal--but can still play on the TV through the cable connector or AV cables). Attach one end of an HDMI cable to the output jack of the receiver and the other end into the input jack on the HDTV. Step5Turn on the TV. Access the menu with your remote, and follow any instructions it gives you. Your HDTV may require a few additional steps to complete the hookup of the receiver (though not all of them will). Step6Access the "input" button on your TV remote. This will allow you to switch the TV signal to one of the cable connections you have just made. For example, if you attached the HDMI cable to the first of two HDMI input jacks, the TV will flash "HDMI 1" on the screen to tell you that is where it is receiving its signal. Hope that helps..........

The VCR portion is connected to yhe TV via yellow-end cable(video) from "video out" to TVs "video in" and red and white-end cables(audio) from "audio out" to TVs "audio in". The DVD plays via HDMI cable from "HDMI out" to TVs HDMI in. S-video cable can be used if no HDMI terminal is available on TV. External tuner in (cable TV, Satellite) is connected to the video and audio in terminals or better yet if S-video out is available on the tuner box.

1. • 1 Examine the back of the your cable box and the back of your Samsung HDTV. Note which cable jacks are of an identical size and color. Those are the ones that can be used to connect the two devices. Samsung HDTVs cluster all the jacks in a single panel near the power cord.
     
   • 2 Look at the square rectangular boxes labeled "HDMI In." These are for high-definition multimedia interface cables--combination A/V cables that provide the highest possible image and sound clarity. Look at the back of your cable box for an identical jack labeled "HDMI Out." If you see one, connect the two jacks using an HDMI cable. If you don't, you need to use another set of cables to hook up your cable box.
     
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   • 3 Check for a series of three round jacks labeled "Component In" and color coded in red, green and blue. These are component video jacks, which provide a good HD picture, but not as good as HDMI. If your cable box has an identical set of "Out" jacks, use them to connect the two components.
     
   • 4 Look for a pair of red and white jacks (possibly connected to a yellow one). These are audio RCA jacks. If you're using component video cables to hook up your cable box, you will need to hook these two up as well: Component video cables don't provide sound. Any cable box that uses component video cables should also have "Out" jacks for RCA audio cables.
     
   • 5 Find the raised circular jack with a pinhole in the center of a milky white plastic interior. This is the coaxial jack. Samsung HDTVs label them "Ant In." Every cable box should have a corresponding jack labeled "Out" or "Ant Out." If none of the other cable jacks on the cable box match, use a length of coaxial cable to connect the TV to the cable box through these two jacks. You can also use this connection to hook the TV directly to the wall cable.
     
   • 6 Turn on your TV and cable box, and set the TV to the input jack connected to the cable box. You can do this by pushing the Menu button on the remote, scrolling down to the "Input" option and pushing "Enter." That will let you cycle through the various input options, labeled by cable type (HDMI, component video). Press "Enter" again when you reach the right component, then exit the menu. You should now be able to watch TV as normal.
     

Read more: How to Hook Up a Cable Box to a Samsung HDTV ' eHow.com http://www.ehow.com/how_4867255_hook-cable-box-samsung-hdtv.html#ixzz2DwgQRtRE

Hi, Yamaha audio-video receivers are equipped with a variety of connecting jacks for hooking up different types of electronic equipment. Component AV cables are typically used for hooking up the receiver to a cable TV box. Component cables can also be used to connect the Yamaha receiver to an HDTV, although a High Definition Media Interface (HDMI) cable offers a simpler connection if the receiver is equipped with HDMI (all HDTV sets are equipped with the distinctive, six-sided HDMI jack). The connections should take less than five minutes.

Instructions

Things You'll Need:

* 2 sets component AV cables
* HDMI cable


Check the back of the Yamaha receiver to determine if HDMI is available. The six-sided jack contains 19 holes set in three rows. If the receiver is equipped with an HDMI Out port, use an HDMI cable to connect to the TV by inserting the plug straight into the jack with the wider end turned upward.


Insert the red, green and blue plugs on a set of component AV cables into the Video Out jacks on the cable TV box, matching the plug colors to the jacks.


Connect the plugs on the other end to a set of Video In jacks on the back of the Yamaha receiver. Make a note of which jacks are used for the connection. Each set of jacks is labeled on the receiver.


Insert the audio plugs on the component cables into the Audio Out jacks on the cable box, using the white plug for the left channel and the red plug for the right.


Attach the plugs on the other end to the Audio In jacks on the Yamaha receiver.


Use a second set of component AV cables to connect from the AV Out jacks on the Yamaha to the AV In jacks on the HDTV only if an HDMI cable was not used.

If you have a set top box (blu-ray, dvd, cable) with HDMI Out, then you need a pair of HDMI cables. Connect one from the HDMI Out of the set top box to the HDMI In of the sound bar. Then connect the HDMI Out of the sound bar to the HDMI In of the TV.

If you only want to use the sound bar as an external speaker system for the TV, then you should get a digital audio cable (fiber optic cable). Connect this to the Digital Audio Out on the TV (below HDMI ports) and to the Digital Audio In of the sound bar.

I hope this helps. You can find the manual of the TV here: http://www2.panasonic.com/consumer-electronics/support/Televisions/Plasma-TVs/model.TH-42PX75U . The TV also has analog (RCA) audio out jacks labeled Prog Out on the bottom left of the connection panel; the sound bar however doesn't have RCA audio in jacks.

Cindy Wells
(since there are no HDMI out jacks on the TV, there is no other way to connect the sound bar.)

The other jacks on the cable box are probably video out for a DVR or DVD/VCR recorder. If you do not have multiple ports, you need some sort of switch or port multiplier. Without knowing the type of cables/ports you are using, I'm not sure which one you need. There are HDMI switches (reviews of some are here: http://reviews.cnet.com/4321-7871_7-6602831.html) if you have to share an HDMI port. Many use remotes to let you select which input is the current one going to the TV.

Similarly there are Component video switchers as well. A few models are here: http://www.hometech.com/hts/products/video/selectors/component/ .

Often you can find these locally as well.

I hope this helps.

Cindy Wells

If your laptp has Blue Ray DVD it likely has an HDMI out jack. Connect this to the HDMI input of you tv. If you TV does not have and HDMI jack but had a DTV jack then get an HDMI to DTV adaptor.

Connect the HDMI outputs on your various components to the HDMI inputs on your receiver. Connect the HDMI output on the receiver to the input on your TV. HDMI incorporates digital audio, so no need to buy optical audio cables. If your receiver does not have HDMI inputs for all your components, you will need to make a choice. HDMI = Best, component video + optical audio = second best, S-video+ optical audio = third best