This is exactly what you need if your 32AV502R shuts off shortly after powering on:
http://www.coppelltvrepair.com/p/427/repair-service-for-toshiba-32av502r-intermittent-shutdown-random-shutoff-not-powering
Hope it helps!
The issue your having comes to mind as a bad power board, What happens over time is the electrolytic capacitors inside these Tv's bulge or just become un-usable.
Many power supplies are plagued by poor electronics components such as these and thus you have a TV with a power issue.
The best bet here is to purchase a new power board or locate the defective component and replace it. Many cases this Tv would end up beside the dumpster awaiting the next pickup date witch pollutes the environment and creates a huge in-pact.
A repair shop would be a option but you will end up with a bill of $200-$400 bucks just for a power board change out!
What a TV tech would do is bring this in and test it with other parts. A TV tech is basically a person that graduated from some post- graduate or trade school and would charge you big money to simply switch out a power supply.
Many people like myself and others have been around the electronics repair era where we fix these broken items for Penny's on a dollar.
Do this at your own risk
If you steer to the internet with this and know basic soldering skills and electronics precautions I would suggest you dig into the unit at your own risk and purchase the components that are actually effected.
You can watch my you tube video on how I basically pulled a power board out of a LCD monitor and replaced its cap's. You can aslo go to my tips on how to search for bad caps and replace them using basic soldering skill.
MY TIPS
Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/edwy_1a56970cf1ea4620
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