It's happened to me
I had updated GT5 to 2.10 and downloaded the free 2014 Stingray DLC and did a few laps in that when I noticed it took forever to exit from the map screen. I had a bad feeling since it took so long, and I tried to exit the game at that point, which rebooted my PS3. When it came back, it was stuck with the wave before the XMB fully loads. I've tried to get it into recovery mode, but without results except for the yellow light. Nothing on the screen and the power button became totally unresponsive. It lit up green, but couldn't do anything to turn it off. It looks pretty dead.
It's not all bad though. I'm in the process of preording the limited edition 500gb white PS3.