Choose the right HDMI signal format on Sony BRAVIA 8
Find the setting for the actual input in use and verify a stable picture from the streamer before enabling other HDMI modes.
IPTVBlogs editorial desk · 
If an external streamer offers 4K or HDR and the Sony television rejects it, check the format of the HDMI input the cable actually uses. BRAVIA’s signal settings are input-specific. Changing a built-in app, or changing the setting for a socket used by a different device, gives you little information about the streamer.
Find the input, then compare two titles
Note the BRAVIA model, input number, streamer output and any device between them. Open External inputs in the BRAVIA settings and find the HDMI signal format or HDMI signal format/VRR option for that port. Names and choices can vary with software and equipment. Save the current choice before making a change.
Start with a known working standard dynamic range title. Then select an HDR title the streamer and service both identify as HDR. If the first is stable and the second fails, check the specific Enhanced format choice Sony documents for the signal and port in use. Change one setting and repeat the same two programmes. Confirm the TV displays the expected format when playback settles.
| Situation | Useful comparison |
|---|---|
| HDR works in a built-in app. The HDMI streamer rejects it. | Leave the TV app alone and verify the external input and output |
| Direct HDMI succeeds, receiver path fails | Confirm the receiver port and each cable run at the intended format |
| 4K 60 works, another device’s 4K 120 mode fails | Consult the Sony port and cable requirements for that higher mode |
| The picture disappears after changing a mode | Return to the last working signal format and retest basic playback |
Keep the game console’s settings separate
A console may need a different port and feature set from a box used for television. Select the input option that matches the device attached to that port and what it actually sends. A more demanding setting is worthwhile only when the source uses it and the rest of the chain supports it.
After a successful test, reopen the original title, switch to another HDMI input and return. A stable picture after switching inputs is more useful than a one-time HDR banner. If you changed both the receiver and the TV for diagnosis, restore one at a time and replay the same sample.