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Faults & possible causes to LCD screen are given with illustrations. You can get an idea about the fault to an extent. Faults to all LCD screen are similar, irrespective of its brand and screen size.
I suspect you have a poor contact on the video processor board or the upscaler itself on the screen. Check all ribbon connectors and look for any components that have got very hot, there may be a dry solder joint beneath them. Hope this helps.
The tv have a long board call a LCD inverter board.This long LCD inverter board is dead.That why,the tv have picture only flashes like a min. than,died and have sound left only.The LCD long inverter board help the LCD screen panel to have a backlight to produced a picture.Tries websites like Shopjimmy.com,Ebay.com to buy a refurbish long LCD inverter board for the replacement.
the power supply of your tv is bad try to check the fuses if fuse are open try to replace them with the same value..try to power it on but if the fuse blows again replace the power supply board...
good luck plse rate my help.
Ur tv the LCD inverter board it dead.The LCD inverter is the board that help the LCD screen panel to get a backlight to produce a picture,the LCD inverter board is dead and it not working anymore that why u only get 8 sec.of the picture.Tries websites like Shopjimmy.com,Ebay.com to buy a refurbish LCD inverter board for the replacement.It a long board in shape.
Sounds like you have a faulty capacitor on your invertor..Gently press on the screen when there is no picture.is there light on the screen? If so, there is backlight but no video..hence a mainboard or power supply problem..If there is no backlight then the problem is the invertors or the power supply not supplying 24volts. The invertor is located on left or right hand side of screen..Check that all connections are secured and not loose.Check that the power supply capacitor tops on the power supply do not have bulging tops..If not, and voltage is reaching the invertor, then remove the invertor and check for bad solder joints and leaking capacitors.