Facing TV Problems? Ask a TV Technician.
Hi and welcome to the site, I’m Louie. Sorry you had to wait awhile but I’ll do my best to help.
Initially, a little more (background) info please:
It would normally be on a name plate or sticker ot the back of the TV. POlease try and check carefully.
Appreciate the additional information and your kind patience while I compose this reply.
To my understanding, the "...sound is going up and down..." without you pressing the + VOL - buttons of the remote nor the buttons of the TV itself. Is this correct please?
And when this happens, the screen ALSO shows the corresponding changes in the volume level?
BUT when the + VOL - buttons of the remote are used, the screen then shows the corresponding changes in the volume level?
I understand and thanks for the clarification; intermittent sound which then changes the symptom.
When the "...sound being interrupted...", is the video presence and quality still the same?
There are two (2) possibilities then; internal hardware issue or a software glitch.
The easiest to perform would be to upgrade the firmware. This would serve as both an attempt of a fix and as a test by process of elimination.
If even with an upgraded firmware the symptom would persist, then the internal hardware issue would be confirmed.
Would you be comfortable upgrading the firmware?
Please click HERE for the instructions.
It would be 'safer' to perform the USB method.
Please click HERE for the actual firmware file.
It would be to your advantage to re-consider using a USB flash drive, even borrowed.
And yes....through the network has had a number of "known bad" results.
Please post back how things turned up and/or should additional information be needed.
Glad that the above information served your purpose and if you haven’t done so, please provide a positive rating at the top of your page
Good luck and thank you too for the opportunity to share the information.
Try the USB.
And if not, then unfortuinately it would be hardware / internal.
For additional test purposes, can you try a Blu-ray or DVD player? ...check if the sound interruption would still be there.
If not (audio is stable), then a possible workaround instead of repairs.