I went off the fact that my symptom was the same as this, turn on, less than a second turn off. When I opened the unit it wasn't easy to tell if the capacitor was defective. Looked slightly bulged but nothing obvious. Regardless I went off to the electronics store and a few hours later I had removed the old one, replaced with a 0.6c part and to my amazement, it worked first go when I stitched it all back together.
Just dropping by to say thanks to the poster in this thread that gave the instructions. Saved me a couple of hundred having to buy a new soundbar. I also learned about soldering at the same time. #winning.
