10 Fixes: TV Says No Signal But Cable Box Is On

TV Says No Signal But Cable Box Is On Issue. A fault typically brings on this issue with the media source linked to your TV. The signal issue may also result from several small TV problems.

[Solved] 10 Easy Fix TV Says No Signal But Cable Box Is On Issue?

Check all the connections between the TV and set-top box to resolve the no signal issue on the TV when the cable box is on. Check-in with your cable providers to find out whether there is a service interruption in your area. Keep reading to know why this issue occurs and how to proceed with troubleshooting steps.

Why Does The “No Signal” Error Occur Even When The Cable Box Is Turned On?

When everything is connected, your TV still displays “no signal” because it is set to the incorrect source. A damaged cable is another typical reason. Other times, it can be an HDCP issue or an HDMI-CEC feature turned on. 

  • It might even imply that there is a problem with your cable provider. 
  • However, it wouldn’t be a stretch to argue that your box has expired. 
  • The error may appear due to service interruptions brought on by snowfall, heavy rain, or strong winds.
  • You must stop using your smartphone and wait for any inclement weather to pass before checking to see if the signal has improved. 
  • The cause is that satellite technology is set up to handle a specific level of severe weather that produces interference.
  • The weather is OK, and your TV’s hardware is not malfunctioning. It implies that the issue may be related to something else, possibly something that is not immediately apparent.
  • Finally, faulty hardware, obsolete software, and TV flaws are all likely reasons.

Causes of TV no signal issue on Smart TV

Satellite issue

  • Resetting or power cycling has made significant contributions to the electronics world.
  • Our satellite dishes and cable boxes occasionally become overloaded with data, which prevents them from operating properly.

Incorrect Cable Connections

Some consumers instantly assume that their televisions are at fault when this occurs. They act in this manner without even considering other scenarios.

  • When the source of the input is incorrect, users first and most frequently encounter the “no signal” problem.
  • You wouldn’t be able to watch cable if your television was set to input two and you were at input 1.
  • This results from your cable being positioned or connected to the wrong source or input.

Cable or antenna issue

  • Even our wires, the ports on our devices, and antennae have a lifespan.
  • To provide us with the service we require, cables are used to connect televisions.
  • Over time, they deteriorate and become broken.
  • You should inspect your cables, TV ports, and similar components frequently.
  • It can be a result of improper cable attachment.
  • There can be some unfinished business that prevents them from creating the content.

Weather Issues

  • An antenna must be used while watching television the old-fashioned way.
  • Due to the superior service quality provided by satellites over cable, certain businesses use them.
  • They are not safe despite the harsh weather. It’s one of the causes of the “TV Says No Signal But Cable Box Is On” error you see on your screen.

How To Fix TV Says No Signal But Cable Box Is On

  1. Verify All Connections And Cables
  2. Restart The Cable Box And Television
  3. Check The TV’s Input Source
  4. Check for HDCP Errors
  5. Check If The TV Box Is Turned On
  6. Check Your TV’s Input
  7. Update your TV’s software
  8. Reset The TV And Reset Your Cable Box.
  9. Contact Support Center
  10. Check if There is Service Outage

1. Verify All Connections And Cables

Verify All Connections And Cables

Cable boxes now use HDMI cables to carry audio and video TV signal. Your TV can show a “No Signal” indication due to a weak or subpar HDMI connection. Verify that the cable is fully plugged in and in the appropriate port.

Since signal loss is the main cause of a No signal error, examine each cable box’s connections to the TV.

  • Verify that neither of the connector ends on your cable box are twisted or damaged if it uses HDMI.
  • If so, purchase gold-plated HDMI cables, such as the Belkin Ultra HD.
purchase gold-plated HDMI cables
  • With a dry cloth or an earbud, check the ports and remove any dust or debris that may be present.
  • Check to see if it also supports high bitrate audio and 4K.
  • Cables and wires, including those that supply power to the box and TV, should all be replaced if broken.
  • You can also do this if your digital television keeps losing the signal.

Change Your HDMI Port

change your HDMI ports

A No Signal notice may result from a broken HDMI port. Since smart TVs feature many HDMI ports, you have a variety of options when it comes to connecting your cable box.

  • The various ports each have a unique number.
  • Additionally, you’ll see one port labeled as HDMI ARC. This port is not to be used because it primarily connects your TV to a home theater system or a sound bar.
  • Additionally, you can test the ports by coupling your TV with a different gadget, like a Blu-Ray or DVD player.

Change the HDMI cable.

Sometimes a bad HDMI cable could cause your TV to display a No Signal message.

  • Even if your cable box is turned on, a broken HDMI cable will prevent it from sending signals to your TV.
  • A cable that isn’t working can only be fixed by replacing it.
  • Connecting your HDMI cable to another working device, such as a DVD or Blu-ray player, will allow you to test it.
  • If the cable is the problem, a new one must be installed. Ensure the cable you buy is original and comes from a reputable seller.

2. Restart The Cable Box And Television

Restart The Cable Box And Television

Restarting the cable box is one of the simplest solutions to a “No Signal” issue. Your cable box functions similarly to a computer, so a quick reboot can often resolve this and other minor issues.

  • Take your cable box off of the wall outlet.
  • Ideally, wait for 60 seconds.
  • Reconnect the cable box to the wall outlet.
  • To check if there is a signal on your TV, turn on the cable box.
  • If it is fixed behind the wall, you must unplug and reconnect your cable box using the circuit breaker.
  • Now, check if this fixes the “TV Says No Signal But Cable Box Is On” issue or not.

3. Check The TV’s Input Source

Check The TV's Input Source

The cable box is not connected to your TV’s input mode, which is another reason your TV displays no signal.

  • Inputs can be changed till you see the TV.
  • To access the inputs, press the input button on your TV remote.
  • Use the directional keys or the input button, and double-check each entry.
  • Now, check if this fixes the “TV Says No Signal But Cable Box Is On” issue or not.

4. Check for HDCP Errors

Check for HDCP Errors

High-Bandwidth Digital Content Protection is known as HDCP. In essence, it’s a cable standard that forbids the privacy of movies or TV shows.

If your streaming or cable device isn’t HDCP-compliant, you may encounter any of these problems: “HDCP Error” or “Non-HDCP Output.” Due to this error, your TV shows “No Signal” or a grey or blank screen.

  • Investing in an HDCP-compliant cable is the most secure and efficient course of action.
  • It could cost extra to buy high-quality cables, but it is still preferable to deal with this problem.
  • Another option is to purchase an HDMI splitter. Make sure HDMI splitters work with your cable box as well.

5. Check If The TV Box Is Turned On

Check If The TV Box Is Turned On

A power supply issue is also indicated by the “No Signal” notification on your screen. Check to see if your cable box or TV is on.

  • When it is on, a green light should be visible. 
  • A red light on your cable box indicates standby mode, so you need to switch on the setup box if you see one.
  • In that situation, a “No Signal” notice will appear on your screen.

6. Check Your TV Antena Signal 

Check Your TV's Input

Due to a bad input source, your TV can show a No Signal indication. Your cable box and TV must have the appropriate input to function properly.

  • Using a remote control, activate the input source.
  • Press the Source button on your remote control after turning on the TV.
  • Choose the preferred input method.
  • Most cable boxes use HDMI 1 or 2 to connect to the TV.
choose between HDMI1 Or HDMI 2
  • Set-top boxes and cable boxes should not be connected to HDMI ARC because this port is only compatible with audio equipment like sound bars and home theater systems.

Change the input source without using the remote.

  • Press the MENU button on the side or bottom of the TV after turning it on.
  • To access the source option, use the volume button.
  • Select the desired input source by pressing the menu button.

7. Update your TV’s software

Update your TV’s software

It’s important to keep in mind that your TV needs to be updated for any streaming devices you use to work properly. The majority of smart TVs need to be updated to support apps.

Outdated software impacts the entire system(like Roku, Samsung, and Sony TV ), not just your TV apps, not to mention even the most fundamental operations. Running on obsolete software will always result in problems.

  • Software upgrades for your TV are often found in the settings menu.
  • Choosing “About” or “About this TV” will take you to your General settings.
  • By choosing “Software Update” or “Check for Updates,” you can update your TV.
allow automatic update
  • Now, check if this fixes the “TV Says No Signal But Cable Box Is On” issue or not.

8. Reset The TV And Reset Your Cable Box.

Reset by disconnecting the power cable (Soft Reset)

  • Switch off your Smart TV
  • From the wall outlet, unplug the power cable.
  • Wait for 60 whole seconds. This will help your TV to clear the capacitor charge.
  • Reconnect the power cord to the wall outlet immediately.
  • Turn on the power TV and check if it solves the “TV says no signal, but the cable box is on” issue.

Reset Using TV Menu (Sof Reset)

  • Your remote’s HOME button should be pressed.
  • Click on settings. Under settings, click “About.”
  • Choose Restart. 
  • When the TV restarts, check if it solves the no signal issue in the Smart TV.

Resetting Using a Remote Control (Hard Reset)

  • Switch on your TV using the remote.
  • Go to the General Setting Of your TV.
  • In General Settings, find the “reset to initial settings” option.
reset to the initial settings of TV
  • Press Ok to begin resetting your TV
Press ok to reset TV
  • Your television will automatically turn off and on again.
  • Now, check if this TV no signal issue is fixed or not.

9. Contact Support Center

Contact Support Center

If none of these suggestions work for you, you may want expert assistance. Inform the customer service department of the cable company of your problem.

Tell them about the conditions you encountered this problem and the troubleshooting techniques you’ve attempted. If necessary, they might send someone in or ask you to try something different in particular to your cable company.

After getting help from the service center, check whether this fixes the “TV Says No Signal But Cable Box Is On” issue.

10. Check if There is Service Outage

Call your cable provider if you’re still not getting a signal. Ask whether there are any outages in your region and how long they will take to fix.

If there is an outage after you finish the call, you should wait until the service is back up. Watch something online or about anything else to pass the time until the outage is fixed.

Reasons Why Your TV’s HDMI Port Isn’t Functioning

If your TV displays a no signal message, it cannot receive any signals from an external input device. There could be several causes for it;

  • The chipset and graphics drivers can be out-of-date.
  • Your TV won’t receive signals if you don’t switch the input sources.
  • Plug the HDMI wire in a small space and unplug the power cable because the device or your TV can take a little longer to read the HDMI signal.
  • Choosing the wrong HDMI settings, or perhaps choosing the incorrect HDMI cable.
  • Only an HDMI type A cable can connect a non-HDMI device. Even then, the amplifier can come out malfunctioning.
  • The ports may sustain damage in some way. If you can’t see it because of minor damage, see a specialist before plugging in your HDMI cable.


The cable box is frequently blamed when your TV displays a no signal message. Even if you believe the cable box is turned on, you should only check to make sure. 

This “No Signal But Cable Box Is On” error indicates that movies and television shows cannot be viewed through your provider. Follow all the solutions given above to fix this issue. If none of the solutions works, it’s time to buy a new smart TV.

Frequently Asked Questions

Why Is My Cable Box Saying No Signal?

If your TV is not receiving a signal from your TV box, a “No Signal,” “No Source,” or “No Input” warning will show up on the TV screen. This frequently occurs because the TV box is unplugged, the TV is not correctly connected, or the TV is set to the incorrect input.

Why Is My Cable Showing No Signal?

Verify the cable connections between your video device or receiver and the TV. Alter the channel, or try an alternative movie or input method. Possibly a weak signal was obtained. You might need to contact your service provider for additional help boosting the signal if your TV uses a cable or satellite box.

How Do You Solve A Spectrum TV When It Says No Signal?

Sending a refresh signal to the Spectrum Receiver usually solves most issues. By disconnecting the power cord from your receiver and waiting at least 60 seconds before plugging it back in, you can also attempt to reboot it. After the receiver has had at least 20 minutes to recuperate completely, turn it back on.

What Does No Signal Mean On Spectrum?

Your “No Signal” notice is most likely the result of a setup or antenna problem if it’s not the result of choosing the wrong source or input. Most of the time, “blocks on the screen” or an occasional “No Signal” notice are signs of reception problems.