No picture My picture has suddenly disappeared. I can change channels and have sound, but no picture, even if I try to get the menu to come up on screen. Is this the picture tube that has gone bad?

try leaving the telly unplugged for 24 hours if you cant exit the menu using the controll is their a back button or exit button on controll you could even try selecting the av channels using av button on controll if the controll is at fault it might be that the pads behind the buttons have become greasy or damp and not allowing you to press it can you change the channels using controll if it is controll prob take apart remove buttons and clean with a dust free cloth if the controll still works and you can change the channels but still have square on screen then it is fault with telly if you unplug it for 24 hours then ry again if you still have problem post back the make n model n age of the set and i will try again sorry couldnt be anymore help ill have another look when no make let me know....................................................................

hit menu button on your remote, navigate to channel setup menu. on the sub-menu, set channel fix to your channel that you require. now when your tv powers up this will be the default channel. if this doesn't fix your issue then try cycling through video inputs tv/video button on your remote.

Maybe it needs to be replaced with something more up-to-date.

I hv philips 21RF vardaan TV ,there is sound on AV channel. and the picture is blinking. even some menu setting have changed.. i tried using the service menu but cudnt understand anything. 2 new av channels have come.. av2 and front which were not present before. sound is not coming even on the other channels but picture is fine on them. only on the av1 channel it is blinking., the philips technision had solved this prob once by pressing some code by remote and i don't know the system code

Check option code's.

Press Display / Info button on "TV original remote", such display will disappear.

If you have static siugnal, sure TV is not dead.

Check the aerial cable, ensure it is well plugged in and getting signal.

If you are using a receiver box, check cables to TV and receiver (freeview, sat, cable etc.), try setting channels on receiver again, if it does not work but you get static, then either the cables or receiver are defective.

Test the TV on standalone , connecting it to an external antenna.
Tune again the channels, and save the preset.
If still no signal then the antenna socket on the TV may be defective.

Try using the TV with a DVD.

If you can watch DVDs, and TV is not keeping channels preset, and you tried all the above, at this point htere may be a fault in the tuner card inside tv.

Call the phone number listed on tv user manual to get support, and eventually repair it.

The black box is there because your closed captioning is on and set to text mode. Some channels send the signal even when there is no actual text to display. You can get rid of it by either turning off closed captioning or changing it to CC1 or CC2 mode instead of text. If you can't find those settings, then restore factory settings as directed in your user manual.

I have the same issue...help!