Back - light problem. Check and replace damaged component/s at its back-light inverter board, or replace this board as card basis. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. It will be best to replace the inverter board as card basis.
http://electronicshelponline.blogspot.com/
In some models of LCD TVS; the backlight inverter and its T'Con board will be a part of the panel itself, and will be a built-in type inside the LCD panel. If so, they can't be replaced. In this case; a panel replacement is the only repair. For some other models, the backlight inverter section circuit will be a part of the main power supply regulator [SMPS]. To such sets, the power supply section circuit too should be troubles hooted. Contact any service technician. The circuit will differ with models and versions.
Type in the brand name of your device, in the search box [at the top right] of the display window and the Search will start at once as you type in, and will show you all the related posts. It will make surf easy.
SOURCE: No picture, just sound
No new video card required. I just reset the television by holding the on/off button for five seconds (yellow light on front panel blinks repeatedly). I then cycled power using the remote control and my picture came back. Worked for me. Hope it works for you.
SOURCE: Toshiba Regza sound but no picture
I had the same problem last night - sound but no picture form any of the inputs - DVD, VCR, FIOS or antenna. I could still see the TV menu. If you go to the TV menu - you can go to the settings (far right top), from there you can choose to restore factory settings, usually needs a code - 0000 (if you did not choose a different one), select yes when prompted if you want to restore factory defaults. This brought my picture back. I lost all of my picture preferences i had set - but at least I got a picture! I hope this helps!!
Marilyn
SOURCE: toshiba regza has sound but no picture.
Hello: One solution to see if the picture is there and you just don't have any back lighting is to take a flash light and shine it at the screen you if you see a faint picture in the background then the inverter boards has failed, and you have no back lighting. If you see no picture then more then likely the Main control board has failed or the power supply has problems.
SOURCE: Best picture settings for toshiba regza 42RV500e
Go to menu on your remote control and select picture setting and try selecting "default" setting to seeif you like the color, if not adjust contrast to about two thirds of the way and brightness to your liking and color to about the middle.
SOURCE: Toshiba REGZA 42
The 2 long boards call the LCD inverter boards are dead.These 2 long inverter boards help the LCD screen to have backlight to produced a picture.These 2 long LCD inverter board are dead,must be replaced to get a picture again.Tries websites like Shopjimmy.com,Ebay.com to buy these 2 refurbishes long LCD inverter boards for the replacement.
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