LG CX drops ARC after a few seconds or don't play any sound (No sound with Philips Fidelio E6/12)
Hello,
first of all: on my previous LG TV (Model LM660) the same speaker ran without problems in ARC-mode.
I have a huge problem with the ARC connection of my new LG CX. I am thinking about returning the TV, as this is extremely annoying on such a high price segment.
As a last chance I try to find a solution over here, because after some research I have used all possibilities that are known to me.
I'm trying to use my Philips Video E6/12 as sound for my TV. I tried it with internal apps like netflix with deactivated Dolby Atmos and with my PS4 and Apple TV (even with activated Stereo Mode to make sure I'm not using DTS).
In most situations I have no sound at all when switching to ARC and a stop symbol is displayed briefly on the right side. Sometimes ( when restarting) the sound is heard briefly through the ARC speakers and switches back to the internal speakers after a few seconds.
Error description:
When reconnecting the cable to the HDMI 2 port: Sound is heard briefly and the connection is interrupted after a few seconds.During normal operation: When changing the sound output ("Sound out") to ARC via the menu I do not get any sound. Sometimes a "stop icon" appears, also when I should have a stereo signal.At initial installation: Audio system was detected directly and ran without problems during the whole time of operation. I can also replicate this by "Reset to factory settings".
Conclusion:
The ARC connection is completely unstable. But the audio system does not seem to be the problem, because 1) it was running on the old TV and 2) there are no problems at the initial setup 3) I can safely say that the problem is not caused by an "unsupported audio format" like DTS, because I can't hear any sound on the Apple TV even in "stereo mode".
I already tried the following (all options one by one, not simultaneously):
- removed all other HDMI devices
- Switched to another HDMI cable which was bundled with the Xbox Series S (Ultra High Speed). However, I don't think that this might be the problem since it is working fine on the LG LM660S.
- Tried out different sound modes on my devices (e.g. PCM/stereo, Dolby Digital etc.)
- CX Settings: Turned "Quickstart+" off, as well as "SIMPLINK" and "Auto Power Sync (one by one and simultaneously)
- Switched between the different options under "Sound out" in the sound settings of the TV (e.g. Passtrough, Auto, PCM)
- Changed from bitstream to PCM in the HDMI-Setting of my devices
- Added the Speaker in Menu Connection Settings under "Universal Remote" -> It was detected as device type "Bluetooth/Sound Bar" and connection type "HDMI 2(ARC)".
Do you have any further ideas?
Thanks in advance.
Answers
Hi friend, I have the exact same issue as you with my OLED55CXPSA. Have you found any solutions yet? I'm still looking for one.
Hi,
Unfortunately I have not received an answer yet. I have tried several channels, but LG Support did not come up with a solution or answer. Your problem sounds very similar, so it is quite possible that the cause is the same. I find it quite embarrassing that we don't even get help with troubleshooting :-(
“We are aware of a compatibility issue related to the Dolby ATMOS and Apple TV. We have a temporary workaround to have the sound work, while we work on developing the fix.
We will need to change a few settings for the workaround. On the LG TV go to:
- Settings → Sound → Additional Settings → HDMI Input Audio Format → HDMI “PCM” Setting
On the Apple TV we will need to change the following:
- Settings → Video and Audio → Audio Format → Dolby Atmos “Off” Setting
A fix for this issue should be out in the upcoming weeks. Please stay tuned for updates.”
I'm also having issues with sound dropouts on my LG CX. It's happening with multiple inputs and soundbars. I've just recently updated the software and reset to factory settings but still seeing the dropouts in audio from my Xbox Series X. Now I'm trying to confirm it's still happening from other input sources. It can take anywhere from 30min to 6 or 7 hours for the dropout to occur. I can usually get the audio to return by changing the audio settings but with my LG soundbar I've noticed that getting the google assistant to speak causes the audio to return as well.
I also posted to the forums about this with some more details.
I'm also considering returning the TV before my Costco return window ends as I'm worried it's an issue with my specific unit. Due to the long amount of time it takes to reproduce and intermittent nature I don't have confidence that LG will be able to troubleshoot and resolve it.
Hi all,
UK owner of LG 65CX and LG SN11RG.
Connected via earc via new ultra high speed truehq cables , although they are not yet certified cables, truehq themselves are.
I have similar issues with both complete dropout and issue of bass dropout where some said they only got bass. Bass dropout happens hourly for a few seconds at a time whilst full dropout is a weekly occurrence
Full dopout can only be resolved by a full mains switch off , which turns off both the TV and soundbar.
I also managed to get full drop off to work by changing input function via speaker app of soundbar. But only able to do this on one occasion. Tried same solution on other occasions without success and noticed speaker app still showed earc as function whilst soundbar itself showed the different function selected..
Inputs are set as bitstream.
I have PS4 Pro, cable set top box ( in UK its virgin tv) , nintendo switch connected to the TV and the Soundbar is connected to the earc hdmi.
Sound drop occurs randomly, I can see no pattern, eg switching sources, for any input source including built in apps such as Netflix.
It seems there is a growing number of users with this earc problem on the CX
I
Is there an update on this?
I am on the latest firmware on CX77PUA (3.21.09).
I continue to have conistent audio dropouts utilizing Dolby Atmos coming from XBOX Series X, Apple TV4 etc. This is NOT confined to just Apple TV.
PCM is fine. Dolby Audio has occasional 'blips.
This seems to have been introduced a few firmwares ago as I don't recall this when I purchased the TV. As it is, Dolby Atmos will drop out completely on Xbox all the time (recovery is by re-cycling to the input).
This is using e-arc from decides to CX to SN 11RG (but issue is even 'on TV only').
When is the firmware coming to fix this?? Lots of posts about if on LG, Reddit and elsewhere.
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