No picture no menu (blank screen) sound works

Go to menu, find picture ( settings) and make screen brighter. I hope this works for you, it has for me.
all the best
kolbrun

Switch to the an input that is not being used. The bars are present, go into the menu and reset the tv to factory settings. If the bars are present it would indicate hardware failure.

If the blank bars are not present on the other input, something is going on with the cord, or a setting in your set top box

It sounds like your TV is in Shop Mode.
Shop mode is a set of picture parameters that have been optimized for a store showroom or display floor. Shop mode does not allow you save any picture settings such as brightness or contrast.
To get the TV out of Shop Mode press and hold the Menu button on the front panel for three seconds, the picture will blank momentarily then reappear with "Dynamic Mode" shown on the screen. At this point the picture parameters can be changed and saved.
If this method doesn't work for your TV there is an alternate method that might.

From the buttons on the front of the TV (not the remote):
1) Press the Volume + (increase volume) button
2) Whilst the volume button is pressed, press and keep pressed the menu button
3) Let go of the volume button and keep the menu button pressed for 5 seconds
4) After this time the screen should go blank and "Dynamic" will appear at the bottom of the screen.

from
http://www.fixya.com/support/t399140-samsung_le46f8_picture_setting

Try resoldering the vertica IC. Very common problem. When vertical drops out the CRTs go into blanking ( shutdown no picture) but the menu and on screen displays will still work. Resoldering the IC will usually solve the issue.

As the manual says "please make sure your TV set can support Progressive format before you select YPbPr Mode or you will can not see picture on TVset" (sic).

To get back from a blank screen:
1 unplug the STB to reset the menu positions to default (because you will be making menu selections blind)
2 plug unit back in and turn it on and use the remote to press in order:
Menu (TV sound will be muted because the menu is now displayed, even though you cannot see it)
Down
Down
Enter
Down
Enter
Down
Down
Down
Right (or Left)
You should then get a picture. Leave the picture setting at CVBS (and don't touch it again lol)
For visual cues on what you are trying to do, look at page 8 of the manual.

Wharfedale LCD3210HDAF this tv was working fine the night before .. when i turned it on in the morning the screen came on then instantly went blank .. although the sound is fine i am unable to get any on screen including menu an volume information and of course can any one help ??

helloFive blinks - AKB circuit (automatic kine bias), the timer/standby indicator blinks for about 30 seconds then goes to the self-diagnosis function. Something is wrong with the video. Check video out, Q705, 732, 761 and other components on the C board, also check Q218, 219, 220 on the A board. In addition, unit could be in IK blanking, try turning up screen slightly.

shaun

If you go to menu do you get that on the screen?

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.

your backlight burnt out, this will be a maybe several hundred dollar repair. the screen is backilt by a very expensive flourescent light, without that light, the screen will be black.