PHILLIPS TV MODEL 32PT6441

I HAVE A PHILLIPS MODEL 32PT6441 THAT TURNS ITSELF OFF AFTER AROUND 20 MINUTES AND THEN FLASHES AN ERROR CODE OF 1-9-2-3 CAN SOMEONE TELL ME WHAT THIS ERROR CODE MEANS..POWER SUPPLY PROBLEMS MAYBE? PLACING A FAN IN FRONT OF THE ENTERTAINMENT CENTER EXTENDS THE TIME THE SET PLAYS...ANY INFO WOULD BE GREATLY APPRECIACED..THANKS
CV