@Plickaunne44 I can guarantee you that all interfaces will be taken into account and work during the migration. Just because the latest generation (TV-Box 5) does not have an analog audio out, that does not mean that this no longer works with the Android TV upgrade on the Swisscom Box 21. I just went through the upgrade again and I can assure you that the analogue and optical outs work perfectly. (Before, during and after the update, an analog amplifier was connected to the jack plug and a monitor without speakers was connected to the HDMI.)

The fact that you have no sound after the upgrade seems very special. Have you ever plugged in headphones and checked to see if you can hear something like that?

Even if the audio settings shouldn’t play a role, I would be interested to know how your TV-Box is set. (Otherwise try Settings->Video and Audio->Audio and Sound->Reset Audio Settings)

What kind of monitor or projector do you use? It would be helpful to know the exact models.

Regarding device returns: I’m sorry if you didn’t get the correct information in the shop. Swisscom takes the devices back and the devices remain in circulation. Returned devices are fully checked for functionality and other damage, cleaned and sometimes even given a new housing. The devices are then used as replacement devices. Only if the devices are irreparably damaged are they thrown into electronic waste and recycled properly.

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Now that sounds really great. Maybe there is still an option in the settings after all; this would be phenomenal. Until now this was not possible in any way. As I said before the update everything worked without errors! (I hadn’t changed anything in the box ex works.) The main thing is that there is a solution. Factory settings don’t help, changing the audio settings doesn’t help… I’ll check again… But what’s going on with technical support…? - I’ll write if I found a solution…

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The options you describe don’t even exist in my TV-Box menu. There are: Settings / Video Audio and then Image Quality / UHD Test / HDR / Audio & Sound / Image Quality for Apps. We have/I have already tried everything. Under Audio & Sound you can simply select one of the three sound variants. Of course, stereo is best for me - the others don’t sound as good. Don’t we have the same software? Of course I would have tried resetting everything, but there is nothing with the picture and sound and anything else…

How sound could be heard during the software update is a mystery to me.

In any case, it doesn’t work for me after upgrading to Android and there is no setting anywhere that would change this. Already the second time.

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I don’t have the option to reset audio settings. There are no other audio setting options either. Resetting the entire box to factory settings doesn’t help either.

(I think the forum is the wrong place if it works for everyone else…)

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@Plickaunne44 If you select the “Audio and Sound” item, you can navigate to the “Reset audio settings” item in the menu at the top right.

Stereo is definitely the right audio mode because you can only output stereo via this output.

If a monitor without speakers is connected to a device (in this case the Swisscom TV-Box) via HDMI, the monitor communicates the information via HDMI that it has no speakers and cannot process audio. To make sure this doesn’t result in the TV-Box not outputting audio, I tested it with a monitor without speakers and it works for me.

I still suggest:

1. Reset audio settings

2. Use the TV-Box remote control to set the volume to the maximum (50/50)

3. Check again with the headphones whether there is no sound

If no sound is output, the following could be checked: Unplug the HDMI cable from the TV-Box, unplug the power cable and plug it back in -> TV-Box should start up without a screen and HDMI -> wait until the box no longer flashes white -> with P+ on the remote control Change the station “blindly” a few times -> check with the headphones whether sound is being emitted. -> If sound is output, the connected monitor is the problem.

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Thank you for the elaborate considerations!

Oh there are the audio settings reset; This was placed there at the top right. OK. (Today I’ll look for what else can be selected in the other submenus up there… Maybe something will happen there.

After resetting, the message came: Your settings have been saved. Unfortunately nothing has changed, it hasn’t helped. The sound is missing. No signal at the audio output. I’m familiar with hi-fi, so I don’t think anyone thinks that’s where the mistake is.

Also a good idea to start without HDMI or monitor. - There is no sound. Unfortunately…

Thank you! These are good exercises for Friday evenings and to stay young.

I will then try a reset without HDMI and with HDMI connected but the monitor is not. However, I think it doesn’t help.

And why not watch TV without sound for even a month; almost like a free crash course in lip reading. It’s absolutely amazing what’s going on here; provided it really still works for others after the update. As I said, it is now the second box that no longer works after the update.

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16 days later

@EnSil

Are you having this problem now, if so, probably after an update?

Was the TV-Box already 30sec. Switched off and on (no power)?

Is the TV-Box connected directly to the Internet Box via LAN?

If all else fails, you can perform a reset with a paper clip. In this case, it is important that the TV-Box is connected directly to the Internet box via LAN.

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Installationen, Netzwerk, Internet, Computertechnik, OS Windows, Apple und Linux.

The problem has now been isolated and reproduced. The problem affects installations where the imaging monitor has no audio output options (neither built-in speakers nor an audio out on the monitor). In this case, the box currently refuses to output sound completely.

We are currently working on a fix that will resolve the problem in a future release.

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I connected the TV-Box 21 in the basement to a computer screen “AOC” without speakers via HDMI, the speakers are connected to the TV-Box.

For the speakers I use these at the link below and it works.

[https://www.apfelkiste.ch/macbook-notebook-laptop-loudspeaker-usb-aux-lautstarkeregel-rgb-schwarz.html](https://www.apfelkiste.ch/macbook-notebook-laptop-loudspeaker- usb-aux-volume-controller-rgb-black.html)

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@WalterB Does your monitor have an audio output? can also just be a headphone output. Then it works. As soon as the audio has no audio options at all, it remains silent. At least that is my level of knowledge of the case.

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@RomanE

Yes, it actually has an audio Anschluss on this screen, so the problem doesn’t exist. 😯

It could be that if you connect this part down in front of a monitor without an audio connection in between, the sound will work.

[https://www.apfelkiste.ch/hdmi-audio-kovnerter-adapter-auf-4k-hdmi-spdif-toslink-3-5mm-klinke.html](https://www.apfelkiste.ch/hdmi- audio-kovnerter-adapter-to-4k-hdmi-spdif-toslink-3-5mm-jack.html)

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Installationen, Netzwerk, Internet, Computertechnik, OS Windows, Apple und Linux.