FAQ
TL;DR: If your Samsung UE49K6370SS plays audio but shows black video, 1 multiplex (MUX‑3) stayed DVB‑T while others moved to HEVC; “This is a 2016 TV with DVB‑T2 support but no H.265 codec support.” This FAQ helps Polish terrestrial TV viewers fix sound‑only issues and decide on decoders. [Elektroda, internick, post #20405633]
Why it matters: It guides you to a quick fix or the right DVB‑T2/HEVC decoder so you don’t waste time or money.
Quick Facts
- UE49K6370SS is a 2016 model with DVB‑T2 tuner but no H.265/HEVC decoding, causing sound‑only on HEVC channels. [Elektroda, internick, post #20405633]
- MUX‑3 was permitted to stay DVB‑T through 2023, so TVP1/2/3 may show video while other MUXes require HEVC. [Elektroda, internick, post #20405633]
- To receive all channels: DVB‑T2 + HEVC (H.265), 1080p or 4K, E‑AC‑3 audio; HBBTV recommended. [Elektroda, TELMOR_PL, post #20405789]
- Quick fix that worked: factory reset the TV, rescan channels; image returned on all programs. [Elektroda, rychu9191, post #20406033]
- Another fix that worked: set country to Sweden, rescan, then return to Poland; image came back. [Elektroda, tomnowy123, post #20958126]
Why do I have sound but no picture on terrestrial TV channels?
Polish DVB‑T2 uses HEVC video and E‑AC‑3 audio. Your TV decodes the audio but lacks HEVC video decoding. That produces a black screen with sound. The tuner still finds and plays channels. Add a DVB‑T2/HEVC set‑top box if the TV cannot be fixed by settings. [Elektroda, TELMOR_PL, post #20405789]
Do I need a new decoder for my Samsung UE49K6370SS?
Try a factory reset or a region switch first. If DVB‑T2 channels remain black, your unit lacks HEVC decoding. Then use an external DVB‑T2/HEVC decoder to restore video on refarmed multiplexes. Keep your current antenna and cabling. They are usually fine. [Elektroda, TELMOR_PL, post #20405789]
Why do TVP1, TVP2, and TVP3 still show video but other channels are black?
These are on MUX‑3, which was allowed to remain DVB‑T. Only one multiplex (MUX‑3) stayed DVB‑T through 2023. Other multiplexes refarmed to DVB‑T2/HEVC, which your TV may not decode. That’s why some channels work and others don’t. [Elektroda, internick, post #20405633]
How can I fix this quickly with a factory reset?
Follow this 3‑step fix:
- Run a factory reset from the TV’s Self Diagnosis or Reset menu.
- Select country/region and run an automatic channel scan.
- Verify all multiplexes and channels display video.
This restored full reception for the original poster. [Elektroda, rychu9191, post #20406033]
Will switching the TV country to Sweden bring back the picture?
Yes, several users reported success. Change country/region to Sweden. Run a full channel scan. Then you can switch back to Poland and keep the image. This refresh toggles codec and broadcast settings on some Samsung K‑series sets. [Elektroda, tomnowy123, post #20958126]
Can changing the country to Czech Republic help?
Yes. One user solved video issues by restoring factory settings, setting country to Czech Republic, and rescanning. After the scan, all programs worked. This suggests region presets can influence HEVC handling on certain models. [Elektroda, interiorfinish22, post #20800458]
What does "DVB‑T2 Ready" on older Samsung models actually mean?
It was a legacy label. Some sets had DVB‑T2 tuners but lacked HEVC decoding. In that edge case, you get audio only on HEVC broadcasts. MUX‑8 can still work because it uses the older system. [Elektroda, LeDy, post #20405971]
How do I check which MUX I’m tuned to and the frequency?
Open the TV’s channel information or signal diagnostics to read the frequency. Compare those values with your external decoder’s MUX list. Share exact frequencies when asking for help. Helpers often request MUX‑8 and other MUX frequencies to verify reception. [Elektroda, internick, post #20405985]
I’m in Kleczanów (Świętokrzyskie). Which transmitters cover me?
You are within range of two sites: Święty Krzyż and Machów. Expect coverage for MUX‑1, MUX‑2, and MUX‑8 from those directions. Align your antenna accordingly if needed. [Elektroda, LeDy, post #20406019]
Do audio codecs matter here, or only video?
Both matter. Poland uses E‑AC‑3 for audio. Without it, you could see video but hear nothing. Your case shows the opposite: audio works but video doesn’t because HEVC is missing. Quote: “E‑AC‑3 audio support.” [Elektroda, TELMOR_PL, post #20405789]
Can I fix this without a firmware update?
Yes. Users restored video by changing country to Sweden, rescanning, then returning to Poland. No firmware update was needed. This refresh reinitializes broadcast tables and codec handling. Try it before buying hardware. [Elektroda, tomnowy123, post #20958126]
Why did it stop working "yesterday" if the refarming was earlier?
The refarming happened earlier. The impression of a recent change can be misleading. You likely watched MUX‑3, which stayed DVB‑T, and only later tried DVB‑T2/HEVC channels. Then the issue became apparent. [Elektroda, internick, post #20405633]
My second TV with an external decoder works fine. What does that indicate?
Your antenna and signal are okay. The external decoder supports DVB‑T2/HEVC, so it shows all channels. The Samsung’s internal decoder or configuration lacks HEVC, causing sound‑only on HEVC broadcasts. [Elektroda, internick, post #20405633]
What are the exact requirements to receive all Polish DVB‑T2 channels?
You need DVB‑T2 reception with HEVC (H.265) video and E‑AC‑3 audio. 1080p resolution is required, 4K is preferable. HBBTV support is recommended. Expert note: “Requirements for DVB‑T2 receivers: DVB‑T2 reception, HEVC compression support (H.265), … E‑AC‑3 audio support.” [Elektroda, TELMOR_PL, post #20405789]
Is MUX‑8 still in the old standard?
Yes. MUX‑8 still operates in the older DVB‑T system. Sets lacking HEVC can often view MUX‑8 channels, even when other multiplexes show black video. [Elektroda, LeDy, post #20405971]
VB-T (MPEG-4), DVB-T2, DVB-S2, DVB-C, analog 
Thank you once again.
