Picture for 1 second then screen goes blank but still have audio

JVC LT-46AM73 LCD TV Won't Turn On - YouTube

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JVC LT-46AM73 LCD TV won't turn on after power outage. ...LCD & LED TV Repair - No Image & Blank Black ScreenFlashlight Test - How to ...

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It is a new tv.Take it back where u bought it and trade it in for another tv.This tv have those 2 LCD long inverter boards have problems.These 2 long LCD inverter boards are to help the tv LCD screen panel to have a backlight for the tv LCD screen to produced a picture.

A firmware update might fix it. Call an authorized servicer, explain the symptom.

Sometimes the picture goes out but the screen is still lit(backlight on), if totally dark like TV was turned off then check voltages in the power supply board(24v, 12v, 5v) if all ok replace the inverter.

You most definately have bad capacitors in the power supply. try and get it repaired as soon as possible, not an expensive repair that iv'e seen.

Hi , I have the same problem with my LT-42X688,so i called the service of my extended warranty provider . the TV technician just left and told me the motherboard is the problem. he said its the third one this week he has seen with the same symptoms. he ordered the motherboard and i've got to wait 5 to 7 work days before the part will be in . I will keep you posted when the guy will return.

Sorry, this has no easy fix. The good news is you do not need an LCD Panel. The bad news is the Video Processor has a problem.
This TV has x3 Boards. The one you should replace first is the one in the middle. If this doesn't fix it, try the one on the right. The Part #s are on the Boards if you wanna try ebay.

You need an Analog Board. It is the one in the middle. You can find it on ebay for $50 I think.

Anytime an LCD has a shade of pink, that means the CCFL lamps are about to go out. Now that you have a black screen, I'd say you just need some new bulbs.

It sounds funny but, unplug the set for 30 seconds to allow the TV to reset then see if the problem still is there.