Why Isn’t My HDMI Cable Working? Common Issues & Fixes

HDMI cables are essential for connecting your TV, gaming console, laptop, or streaming device to displays and monitors. But when your HDMI cable isn't working, it can be incredibly frustrating — especially when your screen suddenly says “No Signal” or you’re getting no picture or sound.

In this guide, we’ll explore the most common HDMI cable issues, explain how to fix them, and help you determine if the problem lies with the cable, the port, or your device settings.

It might sound simple, but many HDMI issues are caused by a loose connection. If the cable isn’t inserted firmly into the port, the signal can cut in and out — or not work at all.

Fix:

• Unplug the HDMI cable and reconnect it firmly.

• Try a different HDMI port on your TV or monitor.

• Make sure the cable is fully inserted on both ends.

HDMI cables can wear out over time, especially if they’re bent, twisted, or unplugged frequently. Internal wires may break, leading to signal failure.

Fix:

• Try using a different HDMI cable to see if the issue persists.

• Use a high-speed HDMI cable if you're connecting 4K devices.

• Avoid using very old or budget cables that don’t meet modern HDMI standards (e.g. HDMI 2.0 or above).

One of the most overlooked issues is simply having the wrong input selected on your TV or monitor.

Fix:

• Use your TV remote to cycle through the HDMI inputs (e.g. HDMI 1, HDMI 2).

• Check that the input matches the port your device is plugged into.

Sometimes the device you're connecting (like a laptop or game console) isn't outputting video via HDMI by default.

Fix:

• On Windows PCs, press Windows + P and select “Duplicate” or “Second screen only”.

• On Macs, go to System Settings > Displays and detect displays manually.

• For gaming consoles, check the video output settings.

If your source device is set to a resolution or refresh rate that your display doesn't support, you may see a blank screen or a “No Signal” message.

Fix:

• Lower the resolution or refresh rate on your source device.

• Try booting in safe mode or low-resolution mode, especially on PCs.

• Use a different display to adjust settings, then reconnect to your desired monitor/TV.

HDMI ports can become damaged due to physical force, dust, or internal failure.

Fix:

• Inspect the HDMI port for bent pins, debris or looseness.

• Use a different HDMI port if available.

• Try cleaning the port gently with compressed air.

Modern HDMI devices use a “handshake” protocol to verify connections and prevent content piracy. If this fails, you might get no picture or audio.

Fix:

• Power off all connected devices.

• Disconnect and reconnect the HDMI cable.

• Turn devices back on in this order: display first, then source (e.g. Blu-ray player).

If your HDMI cable is showing video but not transmitting audio, it could be a software or settings issue.

Fix:

• On Windows, go to Sound Settings > Output, and select your HDMI device.

• On TVs, check Audio Settings for HDMI audio output.

• Replace the HDMI cable if it’s an older version not supporting audio return channel (ARC).

1. Try the same cable with a different device.

2. Try a different HDMI cable with the same device.

3. Test a different HDMI port on your TV or monitor.

If the issue follows the cable, it’s likely a cable fault. If it follows the port or device, you may have a hardware or settings issue.

At Maplin, we stock a range of premium HDMI cables compatible with:

• 4K Ultra HD and 8K TVs

• Gaming consoles (PS5, Xbox Series X)

• Streaming devices (Roku, Fire Stick, Apple TV)

• Laptops and monitors

When buying a new HDMI cable, look for:

• High-speed or ultra high-speed (for 4K/8K compatibility)

• Gold-plated connectors (better conductivity and durability)

• Braided or reinforced cables (for flexibility and strength)

If none of the above solutions work:

• Update your device firmware

• Try a different display or TV

• Reset your device to factory settings

Or contact the device manufacturer for support. Sometimes, a faulty graphics card or TV hardware issue may be to blame.

A non-working HDMI cable doesn't always mean your cable is broken. It could be something as simple as a wrong input source or a minor setting tweak. With the right troubleshooting, you can often fix HDMI issues quickly and without extra cost.

If you’re still struggling, consider replacing your cable with a certified high-speed HDMI cable for a more stable and reliable connection. You can explore our full range of HDMI Cables today!