No picture just clicking

My nook won't show the picture I just have the sound what would cause this?

U restart the tv,u hear alots of clicking?That mean the Ballast is dead or have problems,that why ur picture lamp not sustaning the picture.Replacing the Ballast might or will sustance the picture.

my 46'' inch tv polaroid lcd has been working fine for 3 years. today my wife and I noticed the tv is shutting off the screen will go black and the power light does switch to red. you can here something inside the t.v clicking but you can turn it on and it will start back fine for 20 minutes then shut off again? Does anybody know whats going out on the tv? let me know

I have the same tv and the same problem happened to me (Actualy twice). It turned out to be the color wheel motor. thats what the clicking noise is.

Yes, it is either that or the "Startup Circuit" is faulty usually it is the associated relay. Thats the clicking sound you hear. When you turn on the TV, the relay is activated along with a timing transistor, the Relay has to make contact within a certain time frame. If the contact is not made during that time frame, the TV shuts down. This is a safety feature in all TV's. If you can get a schematic it will show you where the relay is or, after you unplug the TV and wait 15 minutes, you can take a look inside at the main circuit board, sometimes they mark the area with either "START UP" or "SHUT DOWN" and there you should see a relay.
But a new one usually has to be soldered in.

pls check the a.c. cord is good,then check fuse of the unit if deffective need to replace it and check the horizontal output if is good or not.

Greetings!
There's a part inside of your tv that over heat, when a minute comes it stop because of the heat. Better check with a tv technician or repair man before the damage became worse.
Thanks.

A click means the power to the LCD has been shut off. Try resetting the TV, pull the AC plug, wait a minute then replug.