2986,2973,2988,2993 are the codes to check. If you wish to get more details, check these sites. http://remotesearch.blogspot.com/http://electrohelponline.blogspot.com/
Pull up previous posts by its left sidebar, or
type in the brand name and model number to of your set, to its search
box, and press 'Enter' or view it in Mosaic / Timeslide option.
PCMag
https://www.pcmag.com > Reviews > Audio > Speakers
Feb 28, 2013 - The Sony HT-CT260 soundbar adds Bluetooth to an already highly capable and modestly-priced two-piece audio system. MSRP $299.99.
Pros and cons: Excellent value ? Built-in Bluetooth ? Treble response isn't the clearest ? View full list
Rating: 4 · Review by Will Greenwald · US$225.00 · Out of stock
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All questions need 'make model (what is is)' as first 3 words in every question please.
Television? Stereo? Sound bar? ICE?
The grinding noise makes me think you have a cooling fan issue, in which case the flashing LED would be signaling an overheat situation.
You can Google
sony model blink codes
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