HELP PLEASE!!!!!! my 65" samsung 1st started by just going dimmer on the left side of the screen, then corrected itself but 30 mins later went black. When I unpligged it, waited 3 minutes then plugged it back in, it remained dark but now flashes a white light from the bottom center upward. It does this even after being left for several days unplugged. i have a picture of the dimming on the left and have video of the flashing light. Please help.