Mustapha Ebi

When I launch my smart tv app, sometimes it stays up for awhile and suddenly goes off. When I'm watching movie on either YouTube or Netflix, I occassionally get black screen for a while before the screen returned to normal. I called the support team a while back and the agent taught me how to perform reset which does work occassionally by pulling the plug off the socket and pressing the start button for 25 minutes or so. Now all the workaround no longer works. Please help!