Media Sonic

When you go to watch a movie in the theater, you can hardly fail to notice that the projector is in action? It projects images on the screen that is in front of you. But, when it comes rear projection TV, that’s not the case. Here, the projector projects the images from inside of the TV onto the inner side of the TV screen; for this reason it is called the rear projection TV or RPTV.

In order to troubleshoot your rear projection TV problems, you need not only to know about the rear projection technology but also the technology of the projector used, the type of the projector lens unit, the screen and the shell-box that contain all the gadgetry of your TV? Major image projection technologies used in RPTVs, are of three types, i.e. cathode ray tube (CRT), liquid crystal display (LCD), which is used in the LCD TVs, and digital light processing (DLP). All these technologies have a certain common platform, but they have very subtle variations amongst them. Because of these differences, rear projection TV problems also vary, depending on the technology used and therefore can become a headache. The common problems with rear projection TV that you can tackle are as follows.

Color Streaks on Screen
If the image on your television screen is streaked with the colors, then most probably, your TV is magnetized. How will you troubleshoot this rear projection TV problem? It is quite easy to get rid of the color streaking. Bring a magnetic coil, close to the top left corner of the TV screen and make small circular motions with it. Gradually, go on increasing the radius of the circles. When the circular movements cover the entire TV screen, start moving away from the screen slowly. You should observe that the color streaks have all gone away and the image on the screen has improved.

Fuzzy Pictures
Does the image on your TV screen have snowy effect? This problem is mostly because of the loose connections of the co-axial cable that runs between the TV antenna and the TV set. See, if the image on the screen moves, when you give it a shake. The rear projection TV repair, in this case is nothing but checking all of the cable connections. Fixing a loose connection can get rid of the fuzzy pictures on the TV screen.

Continuous Shutdowns
Most often than not, the problem of repeated shutdowns is caused due to the TV timer, which has been accidentally turned on. Overheating may be the alternative cause of your TV’s shutdown. Remove the objects that are preventing the free ventilation of air within the TV and in the surrounding area. If the problem persists, then you may have a real problem at your hand. Contact the customer service of the manufacturer, if your TV is in warranty period, else you can call a professional technician to repair your TV.

Gray Spots on Screen
If you are using the TV set for more than 10 years, you may encounter the problem of gray spots. Basically, the inner surface of these TV screens are coated with a phosphorus layer. This layer absorbs energy from the electrons that are shot at it, by the electronic gun inside the TV. When a particle of the phosphorus is hit by the electron, it glows in an attempt to release absorbed energy in the form of light. When the electrons hit this layer in a pattern, we see it as an image on the screen. However, over the period of time, phosphorus particles in the layer burn and can no more glow and appear as gray spots on the screen. This problem can be solved by rear projection TV screen replacement. The best way of doing this, is to let the experts handle the replacement, and any additional repairs if required.

How to Repair Rear Projection TV?
There are times, when you need to buy rear projection TV parts to replace the faulty parts during rear projection TV repairs. While doing so, one has to take into account the following steps.

• Disconnect the power cable of the TV from the power source.
• Check all the cable connections to see, if there is any loose contact anywhere. If you find everything all right with the connections, check and see if all the buttons are working properly.
• Check all the buttons of the remote control. Sometimes, they tend to get stuck in their slots, causing the TV to go haywire.
• Check out all the TV circuits from the TV repair manual. This can be bought at the TV retailer from whom you have purchased the TV set.
• The instructions detailed in the manual may help you in troubleshooting your rear projection TV problems.
• Open the shell of the TV box and find the part which is faulty with the help of a multimeter.
• If you are not able to locate the faulty part, contact the customer service to get proper advice to carry out the repairing.
• Put the shell back on and connect the power chord properly. If your TV is still not working properly, then consult a TV technician.

     The response to the footage was mixed. Police and the families of the 32 victims criticised NBC’s decision to broadcast it, calling it insensitive. Some campaigning bloggers, however, demanded that the network release all the video and audio files immediately - and even argued gruesomely that the confession was a macabre version of video blogging.

     However, Cho - clearly proficient with technology - did not use YouTube to make his statement; he sent his material to the news networks. We will probably never know whether he had an affection for NBC, or simply needed time to ensure that he could commit his crimes. But the immediate impact Cho achieved by going to an old media outlet was clear.

     Shaky images

     “It could end up being a significant moment,” says Jay Rosen, a journalism professor at New York University who specialises in the relationship between the public and the press. “The simple fact of people getting pictures and videos and giving it news organisations to run - that has now been institutionalised.”

     NBC’s exclusive was striking because, until Cho’s footage came to light, much of the media response to the Blacksburg shootings had been to view it as a watershed for eyewitness reporting.

     The shaky and brief images of police storming a university building, recorded by student Jamal Albarghouti on his mobile phone, had been a breakthrough. After filming the clip, Albarghouti sent it to CNN, which placed it online - where it was watched by millions - and quickly ran it on air. “We used to say that journalists write the first draft of history. Not so, not any longer,” says Dan Gillmor, author of citizen journalism bible We The Media. “The people on the ground at these events write the first draft.”

     Kyle MacRae, the founder of photography agency Scoopt, which sells pictures on behalf of amateurs and was recently bought by Getty Images, adds: “The message has now got through to anybody who gets caught in the middle of an event - the realisation of what you can do has grown enormously.”

     The circumstances in Blacksburg were peculiarly suited to hi-tech, first-hand coverage. The 2,600-acre campus was full of young, tech-savvy students, toting laptops and mobile phones. And once the police had locked down the area and stuck people back in their dorms, they turned to the tools they were most familiar with - websites, blogs and instant messaging. read more »