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Power supply board is dead.Replaced the power supply board will solved this problems.Tries websites Shopjimmy.com,Ebay.com to buy a refurbish power supply board for the replacement.
Hi my name is Roety,
I hope I can help you with your issue ,
Sounds like you need a new mainboard.
Make sure you match it with the correct model/version number
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Thanks
Hi Rickpo:
After installing the $11 kit and the additional $13 kit recommended by (http://preher-tv.blogspot.com/2010/01/samsung-hpt4254-no-power-repaired.html) mostly surface mount diodes (also available on Ebay), the Samsung HP-T4254 came back on, but would only play for 4 minutes. I found DX801 flowing both directions, replaced it with a diode from Fry's. Works great, $26 total repair costs :-)
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