Black screen no picture but have front panel lights are all on

Due to the cost of repairing this I would just replace the TV

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Line, faults & possible causes to LCD screen are given with illustrations. You can get an idea about the fault to an extent.

put a flashlight behind the TV screen or front screen close, just try as close as possible, if you see image that means that the Back-Light inverte is defective or the screen lamps are not working, if deres no imagen the video card is not working (main board)

Sounds like maybe power supply, but I would check with flashlight 2 in from screen when the green light comes on to see if you have a picture, if so then you have a bad inverter board, if not then power supply problems. You can look for bad or bulged caps in PS

id check the blue screen control first
its at the bottom of the set you will have to take the front panel off and behind it is another small black panel remove that one
and to select any function those controls need to be attached so slide that front panel to the left there and take you remote put the tv on video input
and there are sic controls on this little black screen control block
look for the screen controls and turn the blue one just slightly clockwise and you will see the blue screen will light up and you will have little arched lines turn the control back slowly till the lines disaper and the screen goes black

and then cycle the set off give it five mins or so and restart it and see if every thing returns and your video is being displayed then switch it back to your input and view and reassemble

most times then not it's the capacitors on your power board that blew there for not supplying the tv with enough power if you open it up and check the capacitors it should be leaking some kind of liquid or the tops have bubbled up. its an easy fix cost>>2 dollars each

My sony tv 1993 model Have no picture, but do have sound. Screen is black. Any ideas?

Is front LED light on?

Have you tried to access the menu features and tried to retune the stations on digital, or are you hooked up for analog.
If you don't know about what i speak, give me a yell. [email protected] I believe my remote sensor card is bad. While this might explain why you can't turn yours off, it would not explain the blank picture. If the menu does show, i would think the picture tube is O.K. if the menu does not show, there are some other things to look at.