Lost the picture and screen is black. Try pressing menu but does not appear, there is sound but no picture at all. this happend from turbning off one night to the next day when turning on. The TV is 2 years old and not used every day

If you hit the "last" button again, it should take you back to the channel you were on before you hit the button. when you lost the picture, was the screen blue? black? If you hit the "menu" button, does the menu come up?

Do you have a cable/satellite box connected to this tv?

Try this first it sounds like you have the closed caption turned on by accident.
On the remote press the MENU button.
Use the navigation keys to move the selector to CC and press OK.
This should bring up the Closed Caption sub menu.
Ensure that the closed caption is set to OFF

Thanks,
Robert

Set the shooting mode to a Creative Zone mode. Press MENU to enter the menu. Under the Setup tab, select [Live View function settings] then press SET. Select [Live View shoot] and press SET. Select [Enable] and press SET. Press MENU to exit the menu. Press SET. The image should now appear on the LCD instead of through the viewfinder.

Refer to "Live View Shooting," Chapter 5 in the manual for more details and the limitations of the LiveView mode.

chrome i.c change

Just enter the appropriate Menu-Setting (without a picture you´ve to do this "blind") - Press "Setup" - 1x key down (=video menu) - 1x key right (switch to sub menus) - 2x key down(=video format) - press select - key up (=interlaced) and press select again - finished!

get into the recovery menu and format your hard drive

Found this on the www.toshiba.com website. Q. I have sound and no picture with the TV powered on?
Models: 26HL47, 32HL17, 37HL17, 42HL17, 32HL37, 26HL67, 32HL67, 37HL67, 42HL67, 42HL167, 47HL167,
52HL167, 42LX177, 46LX177, 52LX177, 57LX177
REF:FAQLCD00111
Using the buttons on the TV itself (not the remote control), press the “MENU” button to see if the TV’s MENU appears on
the screen. If the MENU does appear on the screen, verify that all of your video connections are secure on the TV and on
the connected device. Double check that you are connected in the appropriate jacks, check the other inputs of the TV to
see if the video appears on any other input. If you still do not see any video but can access the menu, try to reset the TV
to the factory defaults.
1. To reset all settings to default values:
i. Press the “MENU” button on your remote to open the menu.
ii. From the SETUP menu, highlight INSTALLATION and press “ENTER”. A new set of Installation
menu icons will appear.
iii. Open the SYSTEM STATUS menu, highlight SYSTEM INFORMATION and press “ENTER”.
iv. Press the LEFT or RIGHT arrow to scroll through the menu bar to select FACTORY DEFAULTS.
v. Enter your PIN code (or 0000 if no PIN code has been set).
vi. Highlight YES and press “ENTER”. The TV will turn off automatically after a few seconds. After the
TV turns off, unplug the TV power cord and then plug it in again to complete the reset process.
vii. If the MENU does not appear on the screen, try resetting the TV by unplugging the power cord for at
least 3 minutes.
viii. If neither of the above steps resolved your problem, you can get assistance with this problem by
contacting our customer solutions department at 1-800-361-3811 Monday through Friday 8am -7pm
CST I hope this helps you with your problem.

Try pressing FN/F5 keys simultaneously, or the key that toggles internal/external Display. Look for the double screen Icons on the keys.

Tap the Pause Key.

Restart and press and hold F8 key when Toshiba logo appears. When the boot Menu appears, select Last Known Good Configuration.

If all else fails ther should be a reset button on the side of the LT. Consult owners Manual for location

same happend to my lns 4692....control board is gone and since it's attached to the screen...everithing is gone,my tv is under warranty,but Samsung did nothing in 3 (three!!) months,though they promised service,repair,replacement..u name it..!!I just finished a complaint letter to attorney's general office,NJ,consumer protection divisin,BBB,and others...let's see what happens...I WILL NEVER BUY SAMSUNG AGAIN, AND THOSE OF YOU WHO WILL, THINK ABOUT WHAT HAPPENED TO ME...SO THINK TWICE..OR THRICE...HA ,HA...SAMSUNG, IN ENGLISH IS...SOME SUCK!!!

just send it to a repair centre, they will repair for free. the problem could be the mainboard, and needs to be changed