LCD TV problems I have a toshiba 55L7200U TV that I have to un plug and re plug in to get it to turn on ,is that a power supply problem or a T Com board?

Your best bet would be to get a repairman to fix it. Poking around in a tv can be lethal.

It sounds like the capacitors on the power supply are failing. you can visually see the bulging top if its the caps. badcaps.net has kits for most pwr sup.

U tries check the power source and unplug,replug the tv back like about an hour later.For the tv to do a resetting itself back to the factory setting.No,fans in LCD or Plasma flat tvs.If this tv a LCD flat screen tv than the tv have power supply board problems,this tv doesn't have fan design into it.After it goes off the tv power LED light indication on the tv bazel frame are blinking?Yes that the tv have a power supply board can't sustance power voltages to the tv anymore.The tv power supply board that the board where the power a/c cord plug into it.Tries websites like Shopjimmy.com,Ebay.com to buy a whole new refurbish power supply board for the replacement.Or have the tv service by a athorized LCD tvs and Plasma tvs shops.

Tv turn itself off after 2-3 seconds the tv still audio voices?Yes,than the tv long board that call the LCD inverter board it is dead.Require change the tv long LCD inverter board,this board help the LCD screen panel to have a backlight to produced a picture or 2-3 seconds tv power died completely no power to tv all?Yes,than this problems the tv power supply board it is dying.That the board where the power a/c cord plug into it.Tries websites like Shopjimmy.com,Ebay.com to buy a refurbish long LCD inverter board or the tv power supply board for the replacement.

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The power supply board is the problems and the causes.That the board,where the power a/c cord plug into it.Tries websites like Shopjimmy.com,Ebay.com to buy a refurbish power supply board for the replacement.

The power supply board is dead.That the power supply board,that the board,where the power a/c cord plug into it.Tries websites like Shopjimmy.com,Ebay.com to buy a refurbish power supply board for the replacement.

sound like the inverter circuit board problem. check & replace back same part# inverter circuit board. hopefully could help!!