HDMI No Signal to TV From Laptop Windows 11 Fix [2026]

Quick Answer: HDMI shows "No Signal" because Windows 11 output isn't enabled or the TV is on the wrong input source. Press Windows + P and select "Duplicate" or "Extend", then verify your TV input matches the HDMI port you're using (HDMI 1, 2, or 3).

Symptoms

• Laptop screen works but TV shows "No Signal" or "No input detected"
• TV shows "HDMI 1" is connected but black screen
• HDMI works with other devices (game console) but not laptop
• Picture appears briefly then disappears
• Sound works through TV but no video
• Video works but resolution is wrong (stretched, wrong aspect ratio)

Why This Happens (Root Cause)

HDMI negotiation between laptop and TV has multiple failure points:

1. Output Mode Not Enabled: Windows 11 defaults to "PC screen only" on HDMI connect. You must manually switch to Duplicate/Extend/Second screen only.

2. HDCP Handshake Failure: TVs and laptops negotiate HDCP (copy protection) on connection. Cheap HDMI cables or adapters often fail this handshake, resulting in black screen.

3. EDID Detection Timeout: TVs take longer to respond to EDID queries than monitors. Windows 11 has a 7-second timeout; some TVs need 10+ seconds to respond.

4. Resolution/Refresh Rate Mismatch: Laptop outputs 2560×1440@144Hz, but TV only supports 1920×1080@60Hz. Without proper handshake, TV displays "No Signal" instead of negotiating down.

How to Diagnose (Manual)

Check 1: Verify Windows Detects the Display

Get-WmiObject -Namespace root\wmi -Class WmiMonitorBasicDisplayParams | Select-Object InstanceName, SupportedDisplayModes

Expected output if detected:

InstanceName                   SupportedDisplayModes
--------------                   ---------------------
DISPLAY\SAMABC\4&1234567&0&UID0  {0, 1, 2}

Check 2: Check Display Output State

Get-CimInstance -Namespace root\wmi -ClassName WmiMonitorConnectionParams | Select-Object InstanceName, VideoOutputType

VideoOutputType = 4 means HDMI. If empty, Windows doesn't see an HDMI device.

Check 3: Inspect Graphics Driver HDMI Support

Get-WinEvent -FilterHashtable @{LogName='System'; ID='4101'; StartTime=(Get-Date).AddHours(-1)} | Where-Object {$_.Message -like "*hdmi*" -or $_.Message -like "*display*"} | Select-Object Message

Look for: "Display driver stopped responding" — indicates GPU HDMI output failure.

Step-by-Step Fix

Method 1: Enable HDMI Output with Win+P (Immediate)

1. Connect HDMI cable
2. Press Windows + P
3. Select "Duplicate" (shows same screen on both)
   • Or "Extend" (TV becomes second desktop)
   • Or "Second screen only" (laptop screen off, TV on)
4. Wait 5-10 seconds for TV to detect signal

If nothing happens: Press Win+P again and cycle through options.

Method 2: Verify TV Input Source

1. Use TV remote, press Input or Source
2. Select the HDMI port your laptop is connected to:
   • HDMI 1 (not HDMI 2 or 3)
   • May be labeled "PC" or "Computer"
3. Wait 10 seconds for HDCP handshake

Common mistake: TV is on HDMI 2 but laptop is plugged into HDMI 1.

Method 3: Update Graphics Drivers

1. Device Manager → Display adapters
2. Right-click Intel/NVIDIA/AMD GPU → Update driver
3. Select Search automatically for drivers
4. OR download latest drivers from:
   • Intel: intel.com/content/www/us/en/support
   • NVIDIA: nvidia.com/drivers
   • AMD: amd.com/support

Method 4: Force 1080p Resolution

If TV shows "No Signal" due to unsupported resolution:

1. Right-click Desktop → Display settings
2. Click on display "2" (the TV)
3. Under Display resolution, select 1920 × 1080
4. Click Keep changes

Try these resolutions in order:

• 1920 × 1080 (Full HD) — most compatible
• 1280 × 720 (HD) — if 1080p fails
• 3840 × 2160 (4K) — only if TV supports it

Method 5: Registry Fix for EDID Timeout

Create a .reg file:

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\GraphicsDrivers\Configuration]
"PollingRetryTimeout"=dword:0000001e

[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\GraphicsDrivers\Connectivity]
"HotplugBehavior"=dword:00000001

What this does: Increases EDID detection timeout from 7 seconds to 30 seconds and forces aggressive hotplug detection.

Method 6: Power Cycle HDCP

1. Turn OFF the TV completely (not just standby)
2. Unplug HDMI cable from laptop
3. Wait 30 seconds
4. Plug HDMI back into laptop
5. Turn TV back ON
6. Select correct HDMI input

This clears stale HDCP keys that can cause handshake failures.

How Againly Diagnoses This Automatically

Againly runs check_display_topology in 0.5 seconds and detects:

• Windows display output state (enabled/disabled)
• HDMI EDID response from TV
• Graphics driver HDMI port initialization
• HDCP handshake completion status
• Resolution/refresh rate compatibility

Instead of guessing, it shows: "HDMI output disabled in Windows — enabling 'Extend' mode and setting 1080p@60Hz for TV compatibility."

[CTA: Try free diagnosis]

Prevention

• Use High Speed HDMI cables (labeled "High Speed" or "Premium") — cheap cables fail HDCP
• Match TV and laptop refresh rates — set both to 60Hz for compatibility
• Update TV firmware — older firmware has HDCP bugs
• Don't use HDMI splitters — they break HDCP handshakes

FAQ

Q: Why does HDMI work with my Xbox but not my laptop? A: Game consoles use different HDCP profiles. Laptops enforce stricter content protection.

Q: Does USB-C to HDMI work better than built-in HDMI? A: Sometimes — USB-C/DisplayPort Alt Mode uses different negotiation than native HDMI ports.

Q: Why is there sound but no picture? A: Audio uses separate pins in HDMI. Video handshake failed but audio passed through. Usually a resolution mismatch.

Q: Is my HDMI port broken? A: Probably not. Test with a monitor (not TV). If monitor works, it's a TV compatibility issue, not hardware failure.

Related: External Monitor Not Detected After Wake | Second Monitor Blurry Fix