Few things are more frustrating than seeing "No signal" or a black screen when you just want to watch something on your Sony Bravia TV. Modern HDMI connections are surprisingly sensitive to cable quality, port selection, and even the order you power devices on. Most "no signal" issues come down to HDMI handshake failures between your TV and source device.
Quick answer
- Check the correct HDMI input and reseat cable connections firmly
- Connect source directly to TV (bypass any receiver or soundbar temporarily)
- Use the TV's highest-bandwidth HDMI port (usually labeled HDMI 2.1 or 4K 120)
- Set source to 1080p or 4K 60Hz to establish connection, then increase resolution
- Try a certified Ultra High Speed HDMI cable — marginal cables fail at higher resolutions
- Power on TV first, then receiver, then source device in that specific order
Symptoms
- TV displays "No signal" message on specific HDMI input
- Black screen with no picture but TV recognizes HDMI device is connected
- Picture worked yesterday but fails today with same setup
- Signal drops out intermittently during use
- New 4K device shows no picture when older devices work fine
Quick checks
- Confirm the correct input — Double-check that your TV is on the HDMI input where the source is actually connected. It's easy to accidentally change inputs.
- Inspect the HDMI cable — Look for sharp bends, kinks, or loose connectors. Try reseating both ends until they click into place.
- Test another HDMI source or display — Plug a known-working device (like a streaming stick) into the same port, or connect your source to a different TV.
- Restart everything — Power off the TV, source device, and any receiver. Unplug them for 30 seconds before turning back on.
Step-by-step fix
-
Start with a direct connection — If you normally run through a receiver or soundbar, temporarily connect the source straight to the TV with a short HDMI cable.
-
Use the highest-bandwidth port — Many TVs only support full 4K or 4K120 on one or two HDMI inputs. Check your manual for labels like "HDMI 2.1," "4K 120," or "eARC," and connect there.
-
Match resolution and refresh rate — Set the source to a conservative resolution first — try 1080p or 4K at 60Hz. Once you see a picture, you can increase to higher frame rates.
-
Disable advanced features temporarily — Turn off VRR, ALLM, and deep color modes while testing. These features sometimes cause handshake failures until the basics work.
-
Power on in the correct order — Turn on the TV first and let it reach the home screen. Then power on the receiver (if used), and finally the source device.
-
Try a different HDMI cable — A surprising number of "no signal" problems are marginal HDMI cables that fail at 4K or higher frame rates. Use a short, certified Ultra High Speed HDMI cable.
If it still isn't working
Identify the failing component:
- Source device problem — If the TV shows "No signal" on multiple ports, but other devices work fine, the console or streamer may be faulty
- TV problem — If multiple devices fail intermittently on different inputs, check for TV firmware updates and consider a factory reset
- Receiver problem — If issues only occur with a receiver in the chain, review the receiver's video pass-through and 4K/8K settings
Document the failure pattern — Note which combinations of source, port, and cable work or fail. This information helps when contacting Sony support or justifying warranty claims.
FAQ
Why did my HDMI connection stop working suddenly? HDMI cables can degrade over time, especially when handling 4K signals. Heat, bending, or connector corrosion causes intermittent failures that appear as "no signal" errors.
Which HDMI port should I use on my Sony Bravia? Use the port labeled HDMI 2.1, 4K 120, or eARC for the best compatibility. These ports typically handle the highest bandwidth and newest HDMI features.
Do I need an expensive HDMI cable? Not expensive, but certified. Look for "Ultra High Speed HDMI" certification for 4K content. Cheap uncertified cables often work at 1080p but fail at 4K resolutions.
Why does power-on order matter for HDMI? HDMI devices negotiate capabilities during connection. If a source starts before the TV is ready, the handshake can fail and result in no signal until you restart both devices.