Tv screen says no channel listed

Cable company is correct - it is impossible for the cable signal to selectively change color. Your TV is missing or deficient in the Red channel. Contact someone local for TV repair.

Assuming you have a TV hooked up to some kind of cable box, I would venture to say the TV is telling you it is not receiving a signal from the cable box.
Two things could be the problem;
1 You are on the wrong channel to receive a signal - some boxes send the signal to you on channel 3 - if your TV somehow got changed to channel 4, for example, it would not recognize the signal from the box. Make sure you are on the correct channel setting.
2. The cable box may not be turned on or formated properly. Turn the box off and then back on after a few minutes. Follow any messages on the screen on the box for a proper start-up.

If nothing helps, call your cable company for assistance..

U get a channel numder and menu screen do show up?Not the tv,it the incomming broadcasting signal cable plug in or the cable box itself have problems.Tries unplug,replug the tv and the cable box back in like about an hour later.The tv will reset itself to the factory setting and the cable box should upgraded it softwares.Should work now.If have the same problems,tell the cable company change the cable box or check the incomming broadcasting cable wire with another tv,see the incomming broadcasting signal cable wire,with a new cable box,see if it work.

You will need to make sure that your cable is connected to the correct input (if more than one) and then enter the Menu and look for a "set up" screen and select "Scan for Digital Channels".

After the scan the TV should be fine.

I recommend doing an automatic channel scan to ensure you are receiving reception, the second thing to check is that are you using a digital set top box and do you have the tv on the correct input setting, eg, av input, etc.
You can also test this theory by getting another tv that you know has channels and works and pug it into the antenna of the unit you are having problem with. I hope this helps.
Good luck.

What is your TV input connection? Are you using Antenna? Cable? Dish?

The Unusable Signal sounds like the TV is not getting a signal. Does your TV have a built in HD Tuner?

If you are using Antenna you might want to try setting up the connections and it should search for quality channels that you get good signal strength. If you are on channel 2 and there is no over the air channel 2 it may say "unusable signal".

i just have a blue screen and it said no signal on the tv

The RF input is the correct one for a cable signal. The other sources use the RCA and other ports which you can connect to other devices, like DVD or VCR players.

If the humm noise only happens when you're on the TV channel then it's likely just the station. Try changing the channel and see if that helps, and make sure the coax is screwed in all the way. Also make sure the other end, if connected to a VCR or other stuff, is tightly attached. If you share cable with many other people and the signal has snow (white spots on the TV), then you may need to buy an RF signal amplifier to reduce the noise.

Source changes the input (RCA versus coaxial versus component inputs), change the channel for different channels..

you might have to look for "hidden" hd channels.

most cable companies are broadcasting the local stations unencrypted, so you should be able to receive them and sometimes a few other "basic" hd channels like discovery or tnt.

try googling your cable system, city and hd channels to see if someone has posted a list of channels (eg, 88-1 or 102-1)

i had the same damn problem for 3 long hours but i found a solution i have olevia 32 inch tv (720). all you gotta do is go to menu>setup>tv>auto channel search> cable> standrad search