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Television turns on but no picture/sound

Toshiba 37AV500U

My TV has stopped working, so now it has the green LED turn on, which means the TV is on, but the screen is still hack (backlight not on either) and there’s no sound either, which usually there’s a lot of static because I just use it for my computer as a bigger monitor for it. (I do have a different TV to work on, but that one is way bigger) I haven’t used this in about two years though, so maybe something inside it broke down or something. Is there a fix to this?

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@shibainu the very first thing you want to do is to remove the back cover from your TV. Check your boards for any missing or odd looking component. Leaking caps, charred components etc. could be an issue. If all of those look okay you will next need to use a multimeter and me sure the voltages from your power board to the main board. the values are usually silk screened on the board. Since your Power Led turns out it stands to reason that your power board is okay. Remember that it is the main board that tells the power board to turn on and what to turn on next. So let us know what those values are, and post some good pictures of your boards with your QUESTION so that we can see what you see. When you test the voltages you will have to turn your TV on, that means you are going to work on some live circuits. DO NOT TOUCH ANYTHING ON THE BOARDS WITH YOUR FINGERS. Just use the meter probes etc.

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