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When the set is turned on all works well for around 10 secs, then the screen turns off. Could the problem be the PSU ?

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Good day..

Yes sir there's a possibility that your power supply is not working well..Automatic shutting down is cause of voltage drop or the output voltage is go down when the load activate..

You have to do is follow this step:

First,open the cover of your TV by loosening all screws at the back.

Secondly,after you open the cover the power supply reveal..Then try to look at the capacitors if it is leak or bulging on top.

Like this:
When the set is turned on all works well for - bugoy31_1.jpg

Thirdly,if you see any leak capacitor remove the power supply from the TV by removing all screws

fourthly,after you remove the unit replace it with the same type and ratings of capacitor.By using soldering iron and soldering pump..(reminders: the capacitors is have a polarity (-/+)so be careful.Also be care with solder the parts make sure that no shorted solder to avoid short circuit..

And finally,test it by powering ON.

Thank you for asking FIXYA for technical assistance

Good luck

Posted on Apr 11, 2011

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***** WARNING potentially FATAL voltages (up to 400V DC) exist on the PSU boards - if you don't know exactly what you are doing don't ! *******
Unfortunatly the fault could be on a) PSU b) CPU board, as this monitors the PSU voltages and will shut down the set if the measured voltages are wrong c) plasma drive circuits - if these are drawing excessive current, or someother fault exists the fault feedback signal to the CPU board will activate and the set will again shut off.
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