How to Troubleshoot a Toshiba 43-Inch Rear Projection TV

Written by billy kirk
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How to Troubleshoot a Toshiba 43-Inch Rear Projection TV
A loose coaxial cable on your Toshiba can cause display irregularities. (tv control and tv 16 image by chrisharvey from

Toshiba Rear Projection TV's can often suffer from magnetisation issues, incorrect audio/video inputs, and misplaced or misaligned cable connections. Fortunately, the task of troubleshooting your Toshiba Rear Projection TV is not something that needs to be left to someone with any particular training or experience. You can troubleshoot your Toshiba TV set in your own home with nothing more than a magnetic coil. If you are a do-it-yourself type who isn't afraid to deal with electronics, you can save a bundle of money in repair fees.

Skill level:
Moderately Easy

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Things you need

  • Large magnetic coil

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  1. 1

    Observe potential power issues with your Toshiba Rear Projection TV. Troubleshooting always begins with checking for the most obvious problems first, so take a quick look at your Toshiba's power cable. Make sure it is securely plugged into the wall outlet or surge protector/power strip.

  2. 2

    Check your Toshiba Rear Projection TV's screen for any slight interference or display "noise" issues. The most common form of this "noise" that can affect your Toshiba Rear Projection TV's display is commonly called "snow", which is a phenomenon that causes swiftly moving white specks and dots on your picture. This phenomenon is caused by a loose coaxial cable. The coaxial cable plugs into the "ANT IN" port on the back of your Toshiba. Even if it is not disconnected, tighten it within this port.

  3. 3

    Look closely at your Toshiba Rear Projection TV's screen for any irregular blotches that are not related to "snow". These are usually caused by magnetisation, which can occur if an external electronics device has been left on top of your screen for too long. Remove this device and break out your large magnetic coil (see "Resources" below for more). Position this coil close to the front of your screen and then wave it slowly in circles to demagnetise the TV set and remove the display irregularities.

  4. 4

    Observe your Toshiba Rear Projection TV and gauge whether only one main function has failed, such as a lack of audio for your program or a lack of picture even though audio can be heard. This is likely an A/V cable problem. Standard A/V cables have a red, a white and a yellow prong on each end of the cable (a total of six prongs). There are red, white and yellow A/V ports both on the back of your cable/satellite box and the back of the Toshiba Rear Projection TV. Ensure the prongs are matched up to the ports via their colour and are not switched up.

  5. 5

    Check for continued lack of both audio and video on your Toshiba Rear Projection TV. If your A/V cables are securely plugged in, it is most likely a video input problem. Video inputs govern the use of different devices -- such as DVD players -- as well as your normal television programming. Grab your remote and use the "Video Input" button to cycle through your available inputs until you select the one for your cable/satellite programming. Video and audio should be restored.

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