No picture on my new 46 inch samsung LCD

sir,
even if you changed the back light inverter the fault remain as same, it seems to be the back light LED is damaged carefully remove the outer frame of the panel then dis connect the LCD then remove the frame of the defuser screen , take out plug your TV, check the LEDs

Problems can often occur with even relatively new Samsung LCD, LED Television. Some customers report their screen going black shortly after turning on the television, and flickering picture even though the TV's speakers continue to produce sound. You can test and rule out a number of things before concluding that your TV has a hardware defect.
First, check the input settings of your television. Often, users will experience a dark screen when first turning on their television if the selected input corresponds with a turned-off or unplugged input, such as a gaming system or DVD player. If the problem persists, try reconnecting all cables on the back or sides of the television. It's possible that one of your cables has gone dead. If you have access to other cables, try swapping these in and see if the problem persists. Some customers report that turning the television off and unplugging it for an extended period of time, up to 24 hours, can fix the black-screen issue. Samsung TV - Power Supply Issues If you've tried all of these suggestions and problems persist, it's possible that the power supply inside the television is defective or broken. The power supply for most Samsung LCD, LED televisions will cost around $150, with labor costs of around $250. Unless you have a fair amount of TV repair expertise, this is probably not the sort of repair you'd attempt yourself.

Hi, while fixing another persons lcd tv i used lower rated power supply to try to fire up the tv ( picture-no sound) the bulbs ( actually cold cathode fluorescent ) lit up but only halfway. So sounds like the power supply for your backlight has gotten weak. You may try a workaround I've used on personal equipment, try turning down brightness on tv-this may,if your lucky, even out the brightness. hope this helped. Prodzilla

When it turns off, try flashlight 2 in from screen and see if you still see picture, if so then it's your inverter board is bad, you can price at shopjimmy.com or discount-merchant.com

No,this problems it the T-CON decoders board problems.This board sit right in the middle bottom of the LCD screen panel.Tries websites like Shopjimmy.com,Ebay.com to buy a refurbish T-CON decoders board for the replacement.

Find your warranty papers....may be a defective screen.

Call Samsug for warrenty repair.Ur LCD inverter board is dead.That why u are not getting video pictures.

If you are seeing light then the back light is working. Can you get a menu?Do any of the other video inputs work? If no video but has backlight and no men or any on screen display replace main board.

No. You probably have a bad Cable Box.

bad panel