I'm sorry to hear about this. You described it flashing: does this mean it's continually flashing or does it just flash once?
My Samsung TV UA46D6000, displays the SAMSUNG SMART TV logo. This happened twice when I was in midst of changing source once while switching from WD media player and once while from switching from DVD player to my cable TV. When the logo flashes, the remote control becomes inactive. i.e. no button on remote works including the power on/off. I had to unplug the TV, and then it starts up. This has happened twice in a week. What might be the problem. The TV is one and a half year old, and is out of warranty.