No picture no sond

possible defrost timer or fan bad and tripping breaker

It could be your mainboard. How long did you have the TV?

Is it in picture in picture mode?

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 ??

the picture tube is weak rejuvinate it...

TRY UNPLUGGING IT FOR FIFTEEN MINUTES THEN REPLUG IT IN,KNOW IT SOUNDS STUPID BUT WORKS SOMETIMES

The main board is bad. I have seen a lot of TV has the same problem like you have. Replace main board will fix it. If you bought these TV from Costco and less than 2 years then they all still under warranty.

check with a flashlight against the screen for picture, if present backlight inverter has failed.

try tapping tv on side with palm and see if it works it might be a bad video chip

I dont follow this one Does the flash work at all? It sonds like t bad connection if it only works when it is off and wont work if it is on Canon Canon Technical Support may know about this one.