Troubleshooting Rear Projection TV Problems
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.
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