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By Pranay Mokida
Issue
Whenever I start any video—whether it’s streaming apps, HDMI input, or a USB movie—the SC9S plays for a minute or two, then suddenly loses connection. Audio instantly falls back to the TV’s internal speakers, and the TV acts like the soundbar no longer exists on the eARC port. The soundbar display still shows “eARC” (sometimes flips to “OPT/ARC” for a second), but no sound.
Temporary Fix
The only thing that gets audio back is power-cycling the TV (standby isn’t enough; full reboot required). After that, the bar reconnects… until the next random dropout. This can happen multiple times during a single movie, which is a great way to kill the vibe.
What I’ve Tried
New HDMI 2.1-certified cable (same result, so original cable seems fine).
Disabled Quick Start+ and Simplink in the TV settings, then re-enabled.
Factory-reset both TV and soundbar.
Tested ARC instead of eARC—works, but no Atmos and same occasional dropout.
Plugged the soundbar into a different power outlet (in case of power spike).
Observed Patterns
Dropouts happen sooner with Dolby Atmos or DTS content, but even stereo YouTube videos eventually cut out.
No obvious heat buildup; bar is in open air, front facing.
Happens whether soundbar is wall-mounted or on its stand.
Questions for the Hive Mind
Anyone else seeing eARC instability with the SC9S on the UP77 series?
Could this be a handshake timing bug on the TV’s HDMI board?
Any hidden service-menu tweaks or firmware betas worth trying?
Should I just RMA the bar, or is the TV the real diva here?
Appreciate any insight—my couch and I thank you in advance!
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By Huig
Hello,
I have a UJ701V tv from 2017. I get a random disturbance of the sound and picture and then the tv reboots. I have already removed the back cover and everything looks fine. According the logfile i have to replace the mainboard but i think the problem will stay.
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By Mariodu
Hey!
So the other day I started installing a new game on my Xbox, and turned off the TV, leaving the Xbox on. The next I was turning on the TV, and it's a black screen. Using the remote, I get a message saying that "Smart Services will soon be available", just before it reboots (shuts down and automatically turns on again). After that it's stuck in this loop until I remove the power cord.
The things I've tried so far:q
Disconnect both HDM-ports and restart Disconnect power cord and re-enter while holding down the power button on the remote Holding down the power button on the remote for 4+ minutes Holding down the power button on the TV (beneath the logo) for 4+ minutes Disconnect power cord for >28 hours and reboot Removed batteries from remote control and reboot Inserted a USB-stick with latest firmware to the TV and rebooted Nothing of this has helped. Any more ideas?
OLED55B7V
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Question
Rae Strachan
Just wondering if anyone knows about any of the faults on my TV that are going on as I keep getting problems with it going on standby and restarting the app memory so annoyed with the company would be better with an old portable
3 answers to this question
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