My Sony Sound Bar Model#sa-ct260h Makes A Loud Squealing Noise Then Powers Off.

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How do I reset my Sony sound bar?

How to reset the Sound Bar

Press the MENU button on the remote control.

Select RESET by pressing the U93; (upper) or U95; (lower) button.

When ALL RESET appears on the front panel display, press the ENTER button, and then the system settings returns to the factory default.

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https://www.sony.com/electronics/support/articles/00200429

Sound Cuts Out or Noise is Heard from the Soundbar

Check the following if the sound cuts out or noise is heard from the subwoofer or rear speaker of your HT-Z9F 3.1ch Dolby Atmos® Soundbar:

Don't block the soundbar and the connected device.

Place your soundbar near the connected device.

Try a wired connection instead of wireless connection.

If using wireless connection, make sure there are no other devices near the soundbar.

Devices such as microwave oven and routers produce electromagnetic waves may that interfere with your soundbar.

Turn on the RF Channel.

On the supplied soundbar remote control, press the HOME button.

Select Setup.

Select Advanced Settings.

Select Speaker Settings.

Select Wireless Speaker Settings.

Select RF Channel.

Select On.

Note:

It may take one minute to reconnect after you change the settings.

If you unplug the power cord, the frequency settings is deleted. Turn the RF Channel to On again.

Your soundbar automatically selects the best channel for transmission when RF Channel is set to On, which makes it stronger against wireless interference.

If the issue still occurs, set the RF Channel to Off.