My plasma TV model P504011 turn off by itself about 2 seconds after being lit. Then, the indicator that usualy turns from red (TV off) to blue (open TV) turns to orange. I thought it might be a warning. I tried some basic stuff. Unplug and reconnect 10 minutes later. Disconnect the cable receiver only try TV etc.. The problem remains the same. Should I buy a new TV, or if the problem can be repaired at a resonable cost?