Facing TV Problems? Ask a TV Technician.
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What is the model number of the tv?
How long have you had the tv?
When the screen goes black, if you try to bring up the tv MENU using the original remote or the buttons on the tv, does anything show up on the screen?
S42AX-YB02 looks like a number off the display panel. We need the model number of the tv found on the back cover of the tv (not inside the tv).
use the menu button on the tv itself.
This service works best if you are with the tv and able to perform steps to narrow down the problem. I suggest you reply back later when you are actually ready to proceed.
what is your previous experience with electronics?
do you own a meter and have used it to measure live high voltage?
do you own a soldering iron and have soldered components onto circuit boards?
have you ever changed out a circuit board?
Unfortunately one of the first steps in plasma diagnosis is measuring the Vs, Va, etc voltages while the tv is plugged in. Visual inspection and estimating the failure is not a valid method of diagnosis. We probably agree that just replacing parts without real testing is not a very cost effective way to proceed.
I would suggest you use a local repair shop but you need to call around because many shops (including the one I work at) charge a non refundable $100 diagnostic fee just to hand you and estimate and total repairs can be about $300. So it might be a good idea to check the prices of new 42" tv's.
I'm sorry for the bad news. Remember that I am here to help you. Please reply back if you need clarification on any of the above.
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failure of the Y board.
$100 used on ebay-
have you ever used a meter to measure live high voltage?
I am sorry, I am not going to be able to help you anymore.