Fixing a Sony TV can involve a lot of troubleshooting. Sometimes the problem will become obvious early on and will be easily correctable, and in other instances, it will take a while to diagnose the problem and some special equipment may need to be on hand to remedy it. Regardless, there are a number of common problems that may afflict your Sony TV that are fixable within your own home, and a knowledge of these will go a long way towards repairing your TV.
Instructions
1. Check the power connections for the Sony TV. Make sure the power cable is securely in the wall socket. If you are using an older Sony TV, wiggle the coaxial cable on the back of the TV (the cable aside from the power cable that goes directly into the wall). If this cable is at all loose -- which can happen frequently over time with a coaxial cable -- this will cause the "snow" effect on your display, which is essentially white static.
2. Check the A/V (audio/video) cables that plug into either your cable box or satellite receiver (this depends on how you receive TV). Make sure these are not switched up in any way. Standard A/V cables are red, yellow and white, and will plug into sockets that are also suitable red, yellow and white. These sockets will be on the back of your box/receiver and also on the back of your Sony TV.
3. Check the selected video input. This can be a common mistake. Sometimes, after a video input had been switched on your Sony TV to accommodate for an outside device such as a DVD player, the television owner may forget to switch the input back, making it impossible to receive a television signal. The display will appear blank and there will be no sound. Make sure to hit the "Input" button on your Sony TV multiple times to cycle through the inputs and ensure that this is not the case.
4. Remove any objects from the vicinity of the Sony TV to reduce the possibility of the TV overheating. External, heat-emitting devices that are on top of the TV or nearby may cause your Sony to overheat and malfunction.
5. Attempt to use a magnetic coil on your Sony TV if it is a rear-projection TV. Rear-projection televisions sometimes can become magnetized, and when this happens the display can suffer. Often, odd blotches will appear on the display as a result. Use a magnetic coil (see Resources below) to demagnetize the TV and get rid of the blotches. To do so, take the coil and wave it in front of the TV's display in slow circles, until you cover the entire display in this manner. The coil should be held about a half inch from the display.
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