42inch Toshiba flat screen TV shows no signal on all channels. How do I fix this.

If you've got the wire screwed on to the connection labelled Antenna you'll need to use the remote for the next step. From the TV remote hit the MENU or SETTINGS button. Look for an option on the screen called setup or signal. Memorizing the channels would be the next step. You may need to change an option here from Antenna to Cable in the setup screen, then let the TV run through all the channels to memorize them.

generally that sign means that there is no signal from the transmitter of the tv company
if changing channels shows as programs then it is at the tv station
if you are moving the aux input selection and there is no wii or dvd,cd pc connected it will show as no signal
basically it is no input signal into the tv set

Try adjusting the settings, You didn\'t supply the Model? Connected to Cable? Sat? Have you contacted your Provider? I can\'t tell much from the video ,Is it "pixels"? Sometimes my toshiba will freeze or become pixelated, it\'s the signal from Xfinity. Pull the plug on the TV cable/sat box wait 30 seconds ,plug in, saame with TV. A sort of reboot. Reset your setting to default. Satrt from the beginning of setup. Is it under warranty? Maybe you should be watching the Outback Bowl,

Yes,Ur Main Tuner signal board is dead.Replaced this Tuner signal board will solved this problems.Tries these websites Shopjimmy.com,Ebay.com to buy a refurbish Main Tuner Siginal board for the replacement.

Yes you will get a better picture quality out of a cable box if you get an HD cable box.
The reason you are getting the diminished picture is due to the signal you are feeding the TV is an analog signal. The newer HD TV's are made for digital TV and this older technology shows all its flaws on this type of TV.

When you get the new box understand that the same channels you are getting plugged directly into the tv are still going to have some grainy look to them but the good thing is that a lot of them are starting to be rebroadcast on HD channels and that is where your new toy will truly shine.

Enjoy your new TV...

Good Luck...

Try setting tv to channel 3 or channel 4, this should coincide with the back of satellite box (a little black switch with a 3 or 4). then switch channels with your satellite box. I would recommend using another output off the satellite box to feed the other tv, a splitter loses some signal quality an can go bad as well. get a long rca cable to feed tv!

hi my name is mark, since you have a cable box. you need to switch the tv back to the analog signal on the tv through setup or menu screen. then use cable remote to change channals. thanks for your question.

I hate to be the bearer of bad news but the cost of replacement LCD panels are about 1200.00 dollars. If you would like me to try and locate a distributor for new replacements I will.

In audio menu, find selection for SAP and change to stereo...
Let me know if more help needed, provide Model #..........T.