How to Test the Power Supply on a Rear Projection TV
Rear projection televisions are the most mechanically intricate televisions in production. The size and complexity of these TVs causes them to draw on more power than other televisions and also renders their power supply more vulnerable to mechanical failure. For this reason, the power supply of rear projection TVs must be tested frequently. Luckily, testing a rear projection television is easy. All you have to do is plug the television into an inexpensive multimeter and use the multimeter to determine if your TV's power flow is up to par.
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Instructions
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Buy or rent a multimeter. Multimeters can be procured online or at an electronics store.
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Test your multimeter on a device other than your television. Make sure that the device you choose is known to have a healthy power supply. By plugging your multimeter into a healthy device, you will be able to see what numeric reading the multimeter displays when it is connected to a healthy power supply. This is the reading you will want to see when you test your TV. Make sure that the electronic device that you test your multimeter on has the same voltage as the television. A "healthy" reading for, say, a 100-volt device will be different than a "healthy" reading for a 120-volt device.
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Unplug your television. If your television is plugged into a power strip, disconnect it from the power strip.
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Unplug your power strip. Attach the power strip to your multimeter. Then plug the television into the power strip. Make sure you connect the TV, power strip and multimeter in this order. It eliminates the risk of electrocution.
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Read your multimeter. If the reading matches that of other healthy electronic devices of the same voltage, then your TV's power supply is functioning properly. If not, then your TV must be taken into a specialist for repairs.
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References
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