Question about Toshiba 36A42 36" TV

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Toshiba no video sound is fine

Have a Toshiba 36A42 TV. Cannot get video to show on any input. Audio is working fine on each input. Menus show fine and I get a short raster when switching to RF. Appears the tube is fine just lost the video of all inputs.

I have not tried the S video yet(didn't have a cable), but all the other video inputs show nothing.

Anyone have a schematic out there for the 36A42?

Thanks for the help,
Oscar

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If you can see the menus this means the CRT, high voltage, scan amplifiiers, the output video processor, and CRT drive circuits are working. The fault is most likely in the video section of the input select circuits.

Maybe the Toshiba parts department can supply a service manual for your set. With a signal source, a scope, and a DVM, an experienced technician can troubleshoot your set to locate where the failure is occuring.

I have not serviced this model, but in other models I have found the main input select IC to be defective. In some cases I also found a bad voltage regulator IC that supplies the input section has failed.

Jerry G.

Posted on May 15, 2009

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