I'm sad to say, but it could be that crack in the screen that's isolated in the bottom right corner. I don't want to blame it on that though since it could be the capacitor problem, but due to the fact that the screen is curved, it could have increased the crack size, breaking the screen. Even though you might say that the screen crack may not be the issue, I'm sad to say it could be, and you may have to replace the TV screen system AKA TV screen which is going to be really hard to do especially with curved TVs. I suggest you take it to a technician. With curved Tv screens, any cracks in it slowly increase through time.