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If your LCD TV or monitor has stopped working, or is displaying one of the following symptoms, then it's a candidate for some new capacitors
- Flickering screen
- Screen image disappears after several seconds
- Dim screen
- Slow start
- Power LED on, but no picture
- Unusual colors and/or lines
The primary cause of LCD TV and monitor failure is caused by faulty capacitors. You can examine the capacitors in your LCD TV or monitor and actually see if they are bad.
If they appear bulged on top, then they need to be replaced.
New capacitors will solve a host of problems in LCD monitors and TV's and will extend the life of your monitor or TV by several years.
Check the cables, connectors and connections.
Take it to a repair shop.
https://www.youtube.com/watch?v=TR2iWN6b-LY LCD TV Repair No Power Power Supply Common Symptoms Solutions How to...
how old is the battery? charge the battery then remove the negative cable place a test light between the battery and cable if the light is on you have a draw unplug things til the light goes out thats your draw
Please unplug tv from wall socket for minute or so,, replug back in and turn it On. If tv still goes to standby itself than its standby light would blink to show an error in somewhere inside tv circuits. Let me know how many times standby red light blinking? There would be 3 seconds long pause in blinking so count pause to pause to determine problem section. Thanks.
Common failure in LCD monitors are due to bad caps in the power supply/inverter board, that will be the first place to check. Please see my albums so you will know what to look for inside.
This is known as SLEEP MODE / STANDY MODE problem.
Simple solutions: 1. Get a power surge protector / strip. 2. Plug your TV power cord to the power surge. 3.Then turn-on your TV using the remote control. Just in case it won't go all the way to normal state. 4. Turn-off the switch of your power surge like 5 times with an interval of 3-5 seconds. 5. Then repeat step 3 and 4. 6. These steps are done to over-ride the sleep mode.
dose the standby button go orange, if it dose then the screen is going back in to standy, its possible that your graphics card is having problems, maybe if you put some more informationt about what happens then you could get better help.
Try it on a different computer. Standy usually indicates not getting a signal from the video card and then it goes into standy. If it works on a different machine or laptop, check your video card.
. Just in case it won't go all the way to normal state. 
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