Your TV is on.
The HDMI cable is plugged in.
Your streaming box, laptop, game console, or cable box appears to be running.
Yet the screen says:
No Signal.
The good news is that this usually does not mean your TV is dead.
A “No Signal” message simply means the TV is not receiving a usable video signal through the HDMI input you selected. The cause can be as simple as choosing HDMI 2 while your device is connected to HDMI 3—or as technical as an HDMI handshake, HDCP, refresh-rate, or bandwidth problem.
Start with the quick checks below before replacing anything.
Quick Answer: Why Does My TV Say No Signal When HDMI Is Connected?
If your TV says No Signal when HDMI is connected, check these five things first:
- Make sure the TV is set to the correct HDMI input.
- Unplug and firmly reconnect both ends of the HDMI cable.
- Restart both the TV and the connected device.
- Try another HDMI port on the TV.
- Test with another known-working HDMI cable.
Sony’s current U.S. troubleshooting guidance recommends essentially this same isolation process: verify the source/input, reconnect the HDMI cable, test another cable, and try another HDMI port.
If those basic fixes don’t work, continue below.
What “No Signal” Actually Means
It helps to separate No Signal from a completely dead television.
If you can see your TV’s:
- Home screen
- Volume indicator
- Settings menu
- Input menu
- “No Signal” message
then the TV panel itself is displaying an image.
The problem is more likely somewhere along this path:
Source device → HDMI output → HDMI cable → TV HDMI input → HDMI negotiation → picture
That makes troubleshooting much easier.
LG similarly notes that when a TV is powered on and displays a “No Signal” message, the cable or connected external device may be the source of the problem rather than the TV panel itself.
Before You Troubleshoot: Identify Your Setup
Different HDMI setups fail for different reasons.
| Your setup | Common cause |
|---|---|
| Cable/satellite box → TV | Wrong input, box asleep, bad cable |
| Roku/Fire TV/Apple TV → TV | Power issue, handshake problem |
| PlayStation/Xbox → TV | Resolution, HDR, refresh rate, HDCP |
| Windows laptop → TV | Wrong display mode, GPU driver, adapter |
| Mac → TV | Adapter, display detection, resolution |
| AV receiver → TV | HDMI handshake or pass-through problem |
| Soundbar → TV | ARC/eARC port confusion |
| HDMI switch → TV | Switch power/bandwidth/handshake issue |
| 4K/120Hz source → TV | Wrong HDMI port, cable bandwidth, input mode |
Now work through the fixes in order.
1. Make Sure You’re Using the Correct HDMI Input
This sounds obvious, but it’s one of the most common causes of an HDMI No Signal message.
Most modern TVs have several HDMI ports:
- HDMI 1
- HDMI 2
- HDMI 3
- HDMI 4
Some may also be labeled:
- ARC
- eARC
- 4K
- 120Hz
- GAME
- Look at the physical port where your cable is connected.
If the cable is plugged into HDMI 3, your TV needs to be set to HDMI 3.
What to do
Press the button labeled one of the following on your remote:
- Input
- Source
- External Input
- Then select the HDMI port that matches the physical connection.
Sony and LG both list correct input selection among the first checks when troubleshooting a TV showing No Signal.
Quick diagnostic trick
Leave the Input menu open and unplug the HDMI cable.
Plug it back in.
Some TVs will briefly identify that a device has been connected. If absolutely nothing changes, that gives you another clue that the cable, source device, or port may not be communicating.
2. Disconnect and Reconnect the HDMI Cable
Don’t just look at the cable and assume it’s connected.
HDMI connectors can appear plugged in while sitting slightly loose.
Turn off both devices and disconnect the cable from:
The TV
and
The source device
Inspect the connectors, then firmly reconnect both ends.
Don’t force the connector.
HDMI plugs should fit smoothly into the port.
Check for:
- Bent connector
- Loose-fitting plug
- Damaged cable jacket
- Excessive strain near the connector
- Dust or debris in the HDMI port
- Cable partially pulled out by wall-mounted equipment
Then turn both devices back on.
LG’s current HDMI troubleshooting instructions specifically recommend turning off the TV and set-top box before disconnecting and reconnecting the HDMI connection.
3. Power Cycle Both Devices to Reset the HDMI Handshake
This fix is more important than it sounds.
HDMI isn’t just a wire carrying video.
When two HDMI devices connect, they exchange information to determine things such as:
- Supported resolution
- Refresh rate
- Audio capabilities
- HDR support
- Copy-protection support
- Display capabilities
This communication is commonly referred to as the HDMI handshake.
If that negotiation fails, you can have:
A perfectly good TV + perfectly good cable + perfectly good device = No Signal
Perform a complete power reset
- Turn off your TV.
- Turn off the connected device.
- Unplug both from power.
- Disconnect the HDMI cable.
- Wait about 60 seconds.
- Reconnect the HDMI cable.
- Reconnect power.
- Turn the TV on.
- Select the correct HDMI input.
- Turn the source device on.
Sony currently recommends turning both the TV and source device off and back on as part of its HDMI No Signal troubleshooting process; it also recommends a full power reset when necessary.
This reset forces the devices to establish a fresh HDMI connection.
4. Try Another HDMI Port
Move the cable from:
HDMI 1 → HDMI 2
or another available input.
Then remember to change the TV’s selected input to match.
What the result tells you
HDMI 2 works, HDMI 1 doesn’t
The original port may have a configuration or hardware problem.
No HDMI port works
The problem is more likely the cable, source device, settings, or television’s HDMI subsystem.
One device works in the port but another doesn’t
The source device or its video settings become the primary suspect.
This is one of the fastest ways to isolate a problem, and both Sony and Microsoft’s current display-troubleshooting guidance recommend testing alternative video ports.
5. Test a Different HDMI Cable
HDMI cables can fail.
And failure isn’t always obvious.
A damaged HDMI cable may produce:
- No Signal
- Intermittent black screen
- Flickering
- Sparkles
- Image dropouts
- Audio loss
- Problems only at 4K or high refresh rates
Try a known-working cable before assuming the TV needs repair.
Some modern TVs also include built-in HDMI diagnostics. For example, Samsung provides HDMI cable testing on supported models, while LG’s Quick Help system can check HDMI connections on compatible TVs.
6. Make Sure Your HDMI Cable Can Handle the Signal
Here’s where troubleshooting gets more interesting.
A cable may work perfectly at:
1080p/60Hz
but fail when you switch to:
4K/120Hz + HDR + high-bandwidth video
That doesn’t necessarily mean the cable is completely dead. It may simply be unable to reliably carry the requested signal.
HDMI cable capabilities
| Cable category | Typical capability |
|---|---|
| Standard HDMI | Older HD signals |
| High Speed HDMI | 1080p and some 4K |
| Premium High Speed | Up to 4K/60 class signals |
| Ultra High Speed HDMI | Up to 48 Gbps; designed for features such as 4K/120 and 8K/60 |
Sony’s current HDMI guidance lists Ultra High Speed HDMI cables at up to 48 Gbps, supporting technologies such as 4K at 120Hz and 8K at 60Hz where the connected equipment also supports them.
Quick test
If your device was set to 4K/120Hz and suddenly shows No Signal, temporarily reduce output to:
1080p at 60Hz
or:
4K at 60Hz
If the picture returns, you likely have a bandwidth, port-capability, cable, or display-setting issue rather than a completely failed HDMI connection.
7. Check Your TV’s HDMI Signal Format Setting
Many newer TVs have per-port settings for higher-bandwidth HDMI signals.
The terminology varies by brand.
You may see options such as:
- Enhanced Format
- HDMI Enhanced
- Input Signal Plus
- HDMI Deep Color
- 4K Enhanced
- Enhanced HDMI
- Game Mode
- HDMI UHD Color
If you’re connecting:
- PS5
- Xbox Series X
- Gaming PC
- 4K Blu-ray player
- High-end streaming device
- 4K/120Hz source
the relevant HDMI input may need its enhanced mode enabled.
Sony notes that certain high-quality 4K input signals require the appropriate HDMI Enhanced setting on compatible televisions.
However, there’s an important troubleshooting trick:
If enabling an enhanced mode caused the screen to disappear, switch back to the standard mode temporarily and reduce the source resolution.
That helps determine whether you’re dealing with a signal-format compatibility issue.
8. TV Says No Signal From a Windows Laptop or PC
Connecting a PC to a television introduces another layer: Windows needs to send video to the external display.
Plugging in HDMI does not always mean Windows immediately chooses the correct display configuration.
First, press Windows + P
You’ll see options such as:
- PC screen only
- Duplicate
- Extend
- Second screen only
Select Duplicate for the simplest test.
Microsoft currently recommends Windows + P as an early troubleshooting step when an external display isn’t showing correctly.
If the TV still isn’t detected
Go to:
Settings → System → Display → Multiple displays → Detect
Microsoft documents this Detect option specifically for connected displays that aren’t appearing automatically.
Check the Resolution and Refresh Rate
The old version of this article recommended forcing 1080i.
Don’t do that as your default troubleshooting step in 2027.
A safer baseline for modern TVs is usually:
1920 × 1080 at 60Hz
If that works, gradually increase the output to:
4K/60Hz
or
4K/120Hz
if the TV, GPU, HDMI port, and cable all support it.
Why lowering the resolution helps
If the PC is outputting a mode the TV or HDMI path cannot accept, the TV may simply show:
No Signal
Dropping temporarily to 1080p60 removes many bandwidth and compatibility variables.
Check the Graphics Driver
If Windows detects the TV inconsistently, your GPU driver may also be involved.
Update the graphics driver through:
- Windows Update
- NVIDIA
- AMD
- Intel
- Your laptop manufacturer’s support page
LG’s laptop troubleshooting guidance includes incorrect Windows display settings and graphics-driver problems among possible causes of no external HDMI video.
9. TV Says No Signal From a Mac
First verify the cable and adapter are connected correctly.
Apple notes that Macs normally detect a properly connected external display automatically.
If it doesn’t appear, open:
Apple menu → System Settings → Displays
Then try reconnecting the display.
On supported macOS configurations, you can also hold Option in Displays settings to reveal Detect Displays, then run detection manually.
If you’re using USB-C-to-HDMI
The adapter becomes another potential failure point.
Your connection is actually:
Mac → USB-C/Thunderbolt adapter → HDMI cable → TV
Any one of those components can cause No Signal.
Try:
- Another HDMI cable.
- Another adapter if available.
- Another HDMI port on the TV.
- A lower display resolution or refresh rate.
- Connecting directly without a dock if possible.
Apple also notes that HDMI support varies by Mac model, so check the display capabilities of your specific machine when using high resolutions or refresh rates.
10. Check for an HDMI/HDCP Handshake Problem
This becomes especially relevant when the HDMI connection works for menus but goes black when you start protected video.
HDCP, or High-bandwidth Digital Content Protection, is used by many copyrighted video services and devices.
Your connection chain may look like:
Streaming device → AV receiver → HDMI switch → TV
Every compatible device in that path must successfully communicate.
A problem can result in:
- Black screen
- HDCP error
- No Signal
- Video disappearing when playback starts
Apple, for example, documents HDCP-related playback errors that can occur with HDMI-connected displays.
Simplify the connection
Instead of:
Device → HDMI switch → receiver → TV
test:
Device → TV
directly.
If direct HDMI works, the television and source are probably fine.
Then add intermediate equipment back one device at a time.
This is one of the most useful troubleshooting techniques for complicated home-theater systems.
What If You’re Using a Soundbar or AV Receiver?
This deserves its own check.
If your setup looks like:
Game console → Receiver → TV
or:
Streaming box → Soundbar → TV
bypass the receiver or soundbar temporarily.
Connect the source directly to the TV:
Source → TV HDMI
If the picture appears
The problem is somewhere in the intermediate HDMI path.
Possible causes include:
- Receiver powered off
- Incorrect receiver input
- HDMI pass-through setting
- eARC/ARC configuration
- Unsupported video mode
- Old receiver unable to pass modern 4K/HDR signals
- HDMI handshake failure
- Cable between receiver and TV
This is especially common when newer sources are connected through older home-theater equipment.
What About HDMI ARC and eARC?
ARC and eARC primarily deal with audio returning from the TV to an audio device.
They do not make an otherwise incompatible source suddenly produce video.
If your soundbar or receiver requires ARC/eARC, make sure it is connected to the television’s HDMI port specifically labeled:
ARC
or
eARC
But if you’re troubleshooting a video No Signal problem from a console or streaming box, simplify the system first.
Direct source-to-TV testing is more useful than changing ARC settings at random.
TV Says No Signal From a Cable Box
For a U.S. cable or satellite receiver, check:
Is the box actually on?
Some receivers look active while they’re in standby.
Look for the power indicator and wake the box using its own remote.
Restart the box
Disconnect power for a short period, reconnect it, and allow the receiver time to boot completely.
Test another HDMI cable
Cable boxes are frequently installed for years without anyone touching the HDMI cable.
Cable failure or loose connections can happen over time.
Connect another source to the same TV port
Try a:
- Streaming device
- Laptop
- Game console
- Blu-ray player
If another device works through the same port and HDMI cable, the cable box becomes the likely problem.
Sony’s current troubleshooting advice uses the same principle: testing another source helps determine whether the problem lies with the television or the connected equipment.
TV Says No Signal From a PS5 or Xbox
Gaming consoles add higher refresh rates, HDR, VRR, and 4K bandwidth to the HDMI equation.
If the TV stops displaying the console after changing video settings, suspect an unsupported output mode.
Try:
- Another HDMI port
- The console’s supplied HDMI cable
- A TV HDMI port that supports your desired gaming features
- Temporarily disabling 120Hz output
- Temporarily reducing output to 1080p or 4K/60
- Disabling VRR temporarily
- Restarting the HDMI handshake
For 4K/120Hz, the complete signal chain matters:
Console + TV port + HDMI cable + TV settings
All must support the requested format.
A premium TV with the wrong cable can still show No Signal.
What If the Screen Goes Black Only at 4K or 120Hz?
This is an important clue.
If:
1080p works but 4K/120 doesn’t
your HDMI port probably isn’t completely dead.
The more likely problem is:
- Cable bandwidth
- HDMI input capability
- Enhanced-input setting
- Source configuration
- Receiver/soundbar pass-through limit
Use this troubleshooting ladder:
1080p/60 → 4K/60 → 4K/120
Stop at the point where the signal disappears.
You’ve just narrowed down the failure.
How to Tell Whether the HDMI Cable, TV, or Source Is Bad
Instead of guessing, use a simple swap test.
| Test result | Most likely problem |
|---|---|
| New HDMI cable works | Original cable |
| Same source works on HDMI 2 but not HDMI 1 | HDMI 1 port/configuration |
| Another device works on same TV port | Original source device |
| Source works on another TV | Original TV/input/settings |
| Nothing works on any HDMI port | TV HDMI subsystem/settings |
| 1080p works but 4K/120 doesn’t | Bandwidth/settings compatibility |
| Direct-to-TV works but receiver doesn’t | Receiver/soundbar/switch path |
| TV menu works but HDMI devices don’t | External HDMI chain |
This is far more reliable than replacing components one by one.
Should You Factory Reset the TV?
Not at first.
A full factory reset erases settings and usually isn’t necessary for a basic HDMI No Signal problem.
Use it only after you’ve already tested:
- Correct input
- Cable
- Different HDMI port
- Another source
- Power reset
- Resolution
- TV HDMI mode
- Device settings
- Software/firmware updates
If multiple known-working devices fail on every HDMI input even after those steps, check your TV manufacturer’s support instructions before resetting.
When the HDMI Port May Actually Be Damaged
Hardware failure becomes more likely when:
- The connector visibly moves inside the TV
- HDMI only works when you hold the cable at an angle
- Pins inside the port appear damaged
- Every known-good source fails on one specific port
- Other HDMI ports work normally
- The TV experienced a power surge
- The HDMI connector was pulled or struck
Don’t repeatedly force a cable into a loose or damaged port.
If multiple ports have failed and software troubleshooting changes nothing, professional service may be appropriate.
Don’t Confuse HDMI No Signal With Antenna No Signal
The original version of this guide mixed HDMI troubleshooting with antenna and coaxial troubleshooting.
They’re different signal paths.
If your TV says No Signal while watching:
HDMI 1
then troubleshoot the HDMI source.
If you’re watching:
TV / Antenna / Air / Cable
through the TV’s tuner, troubleshoot:
- Coaxial cable
- Antenna
- Channel scan
- Signal strength
- Cable-provider feed
Changing antenna position will not fix a PlayStation connected through HDMI.
Likewise, swapping an HDMI cable will not repair an over-the-air antenna problem.
Fast HDMI No Signal Troubleshooting Checklist
If you just want the shortest possible path, use this order:
1. Confirm the external device is powered on.
2. Select the correct HDMI input.
3. Disconnect and firmly reconnect HDMI.
4. Power-cycle the TV and source.
5. Try another TV HDMI port.
6. Try another HDMI cable.
7. Connect the source directly to the TV.
8. Reduce output temporarily to 1080p/60Hz.
9. Check enhanced HDMI/4K settings.
10. Test another source device.
At that point, you should have a much clearer idea which component is causing the problem.
Frequently Asked Questions
Why does my TV say No Signal when HDMI is plugged in?
Usually because the TV is set to the wrong HDMI input, the source isn’t outputting video, the HDMI cable isn’t making a reliable connection, or the devices failed to complete their HDMI handshake.
Start by selecting the correct input, reconnecting the cable, restarting both devices, and testing another HDMI port.
Why is HDMI connected but there’s still no picture?
A physical connection doesn’t guarantee a usable video signal.
The source device may be:
- Sleeping
- Using an unsupported resolution
- Outputting through another port
- Experiencing an HDCP problem
- Failing the HDMI handshake
The cable or TV port may also be faulty.
Can an HDMI cable suddenly stop working?
Yes.
HDMI cables can fail because of physical damage, repeated bending, damaged connectors, or internal conductor problems.
A marginal cable may also work at lower resolutions while becoming unstable with high-bandwidth 4K/HDR/120Hz signals.
How do I know if my HDMI port is bad?
Connect multiple known-working source devices and cables to that port.
If they all fail there but work through another HDMI input on the same TV, the port or its configuration becomes the likely cause.
Why does HDMI work at 1080p but not 4K?
The cable, HDMI port, source device, intermediate receiver, or TV input setting may not support the higher bandwidth.
Test 4K/60 before attempting 4K/120, and make sure you’re using the correct HDMI input and cable type.
Why does my TV say No Signal from my laptop?
On Windows, press Windows + P and choose Duplicate or Extend. Then check Settings → System → Display and use Detect if necessary.
Also test a lower resolution, another cable, another HDMI port, and updated graphics drivers. Microsoft specifically recommends Windows + P, cable testing, and alternative video outputs when diagnosing external displays.
Why won’t my Mac connect to my TV through HDMI?
Check that the Mac supports the intended external display configuration, verify the HDMI cable or adapter, and open System Settings → Displays.
Apple says a properly connected display should normally be detected automatically; reconnecting the display and manually using Detect Displays are among its recommended troubleshooting steps.
Should I use HDMI 1 or HDMI 2?
For ordinary video, either may work.
However, some TVs support specific features only on certain HDMI ports, including:
- 4K/120Hz
- VRR
- eARC
- Enhanced HDMI modes
Check the labels beside the ports and your TV’s specifications.
Does turning the TV off reset HDMI?
A normal power-off may help, but a full power cycle can be more effective.
Turn off both devices, unplug them, wait around a minute, reconnect HDMI and power, and then restart the system.
This forces a new HDMI handshake.
Why does my HDMI picture keep cutting out?
Intermittent blackouts often point to:
- Marginal HDMI cable
- Loose connector
- Excessive cable length
- HDMI bandwidth limitations
- Handshake instability
- Problematic receiver or switch
- High-resolution/high-refresh-rate configuration
Test a shorter known-good cable and simplify the connection.
Does “No Signal” mean my TV is broken?
Usually not.
If the TV can display its menus and the No Signal message normally, it is functioning well enough to render an image.
The HDMI source, cable, input selection, settings, or handshake is more likely to be responsible.
Final Takeaway
When your TV says No Signal even though the HDMI cable is connected, don’t immediately replace the TV.
Start with the signal path.
Correct input → secure cable → restart → different port → different cable → different source
Those six checks solve or identify a large percentage of HDMI problems.
If you’re using newer equipment, also pay attention to resolution, refresh rate, HDR, HDMI bandwidth, enhanced-input settings, and HDCP. A connection that works perfectly at 1080p may fail at 4K/120Hz if one component in the chain cannot handle the signal.
And if you have an AV receiver, soundbar, HDMI switch, or adapter between the source and TV, remove it temporarily.
The fastest way to diagnose HDMI is to make the connection as simple as possible.
Source device → known-good HDMI cable → TV
If that works, add the other equipment back one piece at a time.