I too am facing this issue. I bought LG 43LF6300 LED TV.
It worked fine for a month. Then i faced below issues.
1.) LG content store app are not getting updated. I called the customer care, they sent technicians two times. The tried but could not do anything. Finally they just gave a frivolous answer that i need to check my internet security. I said, this used to work fine for a month, that time i didnt change any security setting of my internet. Also i tried by keeping my WIFI without password, still it doesnt work
2.) The operating system started crashing. While watching a video in the browser window, suddenly its stops working and gives an error message - "this app needs to restart to free some memory". This error keeps on coming. Now i cant see any video using the internal browser.