The TV says no signal, but the cable box is on. So what could be the reason, and how do you fix the problem? That’s what this troubleshooting guide is all about.
Even though cable television is reliable even during bad weather and has fewer interruptions, it can fail at times.
The common problem users face is the no signal error even when the cable box is on.
One of the common reasons you have a no signal error on your TV is a wrong input or source. You could also have a bad cable connection, faulty ports, frozen cable box, or there's interruption of service.
If you were just about to catch your favorite TV show, but your TV doesn’t have a signal, you came to the right place. Find out what causes a TV to show no signal, plus the possible fixes.
Why TV Says No Signal But Cable Box Is On
What does it mean when there is no signal on TV? If your cable box is on, but you have no signal on your TV, the problem could be on your cable box or the TV.
Below is a troubleshooting guide with the most probable causes and solutions for the no signal error.
1. Wrong Input Source
In most of the cases where my cable box is on but my TV says no signal, the problem is the input. As you may be aware, modern TVs have different inputs.
The input you choose on the TV should tally with that of the cable box.
For example, if you are on HDMI 2 on the cable box, the TV’s input source should also be on HDMI 2. To fix the problem, you will need to set your TV to the right source.
Below is a step-by-step guide to fix a TV that is on the wrong input.
Step 1: Locate the TV Input or Source button on the TV’s remote.
Step 2: Toggle between the different inputs
Step 3: Cycle through all the inputs until you find one with the programming of your cable box.
If the problem was wrong input, you should have solved the problem of the TV saying no signal when the cable box is on.
Note: Modern TVs have several inputs, for example, HDMI 1, HDMI 2, HDMI 3, Component 1, Component 2, and VGA. But most cable box TVs use HDMI, so focus on the HDMI inputs.
2. Improper Cable Connection
If you are sure that you are on the right TV input but still have the no signal error, the next thing to do is inspect the cables to make sure they are properly connected.
An improperly fixed cable, either on the TV or the cable box, can cause the no signal error.
Below is a step-by-step guide to fix an improper cable connection.
Step 1: Turn off the TV
Step 2: Locate the HDMI cable that sends the signal from the cable box to the TV.
Step 3: Unplug the cable from the TV and cable box for 2-3 minutes.
Step 4: Plug the cables back and restart the TV.
Step 5: Wait for the cable box to initialize and the TV to pick up the signal.
Note: When putting the cables back, make sure they are connected firmly to the correct port, are undamaged, and secured.
If the problem was a bad cable connection, you should now have a signal on your TV after plugging in the cables.
3. Faulty Cables
Another reason for the no signal error on your TV is faulty cables. If the cable is not in order, there will be a signal leak.
To solve the problem, you will need another cable to ascertain whether it’s your cable that is faulty or not.
Below are the steps to follow.
Step 1: Unplug the cable from both the TV and cable box.
Step 2: Plug in the new cable.
Step 3: Check whether your TV is getting a signal.
If the cable was the problem, you should now be able to watch TV without any problem.
4. Faulty Ports
A faulty port can also be why the TV displays the no signal message when the cable box is on. Here, you will need to try out a different port to see if the problem will be fixed.
Below are the steps to follow if your cable box and TV have multiple ports.
Step 1: Unplug the cable from the current port on the cable box.
Step 2: Plug the cable into a different cable box port.
Step 3: Wait for the TV to pick up the signal.
Step 4: Check whether the problem is fixed.
Step 5: If the problem is still there, repeat the same procedure but now, swap the TV’s input port.
The above steps should solve the problem if, indeed, you had a faulty port.
Note: When changing ports, also remember to change the input. For example, if you have swapped the cable from HDMI 1 port to HDMI 2, change the TV's input to HDMI 2.
5. Frozen Cable Box
If you are stuck with the no signal error even after ascertaining that you are on the correct input and all your cable connections and ports are in order, you might have a frozen cable box.
The solution here will be resetting it, but just before performing a reset, restart it and check whether the problem is solved.
If not, follow the steps below to reset your cable box.
Step 1: Locate the power cable and unplug it from the cable box.
Step 2: Wait for a minute or two and then plug in the power cable.
Step 3: Restart the cable box and wait for it to boot.
You should be able to access the cable box programming if this was the problem.
That’s a detailed explanation on the reasons behind a TV that shows no signal even when the cable box is on.
If you are still stuck after trying the above troubleshooting methods, there might be a service interruption. In this case, the best thing to do is to contact the cable box company to find out why you have no signal.
There are many reasons behind a TV that says no signal even when the cable box is on. It could be a wrong input, bad cable connection, faulty ports, a frozen cable box, or service interruption.
Read Next: How to Get Free Channels on Smart TV?
If your TV says no signal but cable box is on, it’s probably a problem you can fix. Try applying the above fixes before wasting time contacting your provider or calling a technician.
But if you are still getting the error, you might have to talk to your cable box provider or seek the assistance of a qualified technician.
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