Fixing a TV screen is not always possible for a non-professional, but sometimes training is not necessary to fix your device, so long as you have a complete set of troubleshooting steps to be guided by. You will also need a few extra pieces of equipment close by, most notably the TV's remote control and a magnetic coil. Many display problems can be fixed via the cables that plug your TV into the power source, the cable or satellite box, or by manipulating the current video input that is selected for your TV.
Instructions
1. Check the cable power connections on the back of your TV. Is your display dark? Perhaps the power cable simply came out of the wall or the power strip. Sometimes the easiest solutions are the one afflicting your TV, so check this first.
2. Consider the satellite receiver/cable box (this depends on what method you use to receive your television). There are Audio/Video (A/V) cables that run from the back of the cable/satellite box to the back of your TV. These cables are red, white, and yellow in color and plug into sockets that are similarly red, white and yellow. Make sure these plugs are secure in their sockets, and also that the right cables are color-matched with the correct sockets.
3. Eliminate the potential for overheating. Look for any source of heat that is either in very close proximity to your TV, or that is actually touching or laying on top of it. If any such significant source of heat exists, remove the device making the heat immediately. Wait for your TV to cool down and then test it to ensure it is working correctly.
4. Switch the video input on your TV. Outside electronic devices that hook up to your TV make use of A/V cables that plug into different arrays of ports on your TV. Each device usually will thus have its own input for your TV. For example, it is necessary to switch the video input on your TV when switching from regular television to the use of a DVD player. Check to make sure you did not forget to switch the video input back in any such case. If you have, the TV will appear to be blank and not displaying any audio or video. Take the remote control and hit the "Input" button to cycle back through the video inputs and see if this was indeed the problem.
5. Degmanetize the TV. If you have a projection TV, there may be blotches on the display that are a result of magnetization. To rectify this problem, attempt to use a magnetic coil on your TV (see Resources). This coil should be held close in front of the TV and moved slowly in circles in front of the display. Use the coil in this manner and cover the entire area of the display, wait a few minutes, and then check to see if the blotches are gone.
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