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Re: will not power on
If you know how, replace all the capacitors that look puffed up or leaking. If this is moore than you can do check Ebay I see a lot of boards for sale cheap there. Enter model and Power supply to your search
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The power supply board have problems,not giving the wright voltages to the tv anymore.That why,the tv shutting down 5 to 15 minutes.Tries websites like Shopjimmy.com,Ebay.com to buy a refurbish power supply board for the replacement.
The main power supply will be the first place to check. You should have at least the standby 5vdc, which is used for the main board, when the power switch is activated, the main board will send out the signal to turn on the main power supply sections to power up the rest of the set. Look for simple thing like blown fuse or bad capacitors. Learn about what bad capacitors can do. http://en.wikipedia.org/wiki/Capacitor_plague
This TV might have been affected by the power outage even if it was not ON at that moment. There is a standby voltage still present even when OFF and connected to the AC line.
There might be different failures on this TV:
1. The power supply might be defective after the power outage.
2. The main board could also be defective since the power supplies for today's TVs are not well regulated and once the voltage getting to the power supply increases, the standby voltage voltage will also increase damaging voltage sensitive components like the microprocessor or memory circuitry.
It looks like the power supply failed on your TV. If the LED is solid red or green, it could be some leaky or dry capacitors but if the LED is blinking, the failure is more complicated to repair.
I service these power supplies. If you need more info you can send me an email to email@example.com
I have been dealing with Shop Jimmy.. and the service has been GREAT.. BUT.. the first board was the wrong model.. ( my fault )
the 2nd was was not 100%... but this is a good place for ILO parts
Actually it;s the only one I have found so far....
I think yours is not a main board problem.. but power supply...